# Ant Man Will Defeat Thanos By Crawling Up His Butt And Expanding

A Marvel fan theory, also called theThanus Theory, joking that Scott Lang could kill Thanos in Avengers: Endgame by shrinking, entering his rear, and expanding back to full size. Born on Reddit in 2017, it became one of the loudest Marvel jokes of the 2018 to 2019 Endgame hype cycle.

## Overview
"Ant-Man Will Defeat Thanos By Crawling Up His Butt And Expanding," also called theThanus Theory, is a joke fan prediction that in Avengers: Endgame, Scott Lang could kill Thanos by shrinking to microscopic size, entering the Mad Titan through his anus, and growing back to full size from within[1]. The bit ran wild on Reddit, Twitter, and Tumblr through the twelve months before the film's April 2019 release[4].

The joke pairs Marvel Cinematic Universe fandom with the appeal of a stupidly simple counter to an infinity-stone-wielding villain[1]. Related tags like "#flushanantman" and phrases such as "rapidly expand from the inside" circulated as image macros, mock movie posters, and copypasta[4].

## How It Spread
Three days later, on March 19, 2018, Tumblr user tanjonathans posted that Infinity War was a pointless movie because you could just get Ant-Man inside Thanos's asshole and make him grow, a post that pulled more than 139,000 notes within a year[3]. On April 30, 2018, Twitter user @filmgloss quipped that Marvel had cut Ant-Man from Infinity War specifically to avoid the exploit, racking up over 30,400 likes and 11,000 retweets[4].

The theory roared back with the Endgame marketing cycle. On March 28, 2019, Thanos actor Josh Brolin posted an old workout-strain video on Instagram tagged #flushanantman, pulling 1.2 million views in 24 hours[6]. On April 2, 2019, Mel Magazine ran a straight-faced explainer where MIT biophysicist Alex Klotz calculated whether Ant-Man could actually rupture Thanos, concluding the pelvis might hold but "literally tearing him a new one" would still land[1].

On April 10, 2019, erotica author Chuck Tingle released "Revengers Buttgame: Antguy Gets Small To Go Into Thamos' Butt And Then Gets Big And Hard," which climbed to #1 in Amazon's Fantasy Erotica category within a day[5]. Marvel eventually acknowledged the bit in June 2022, when a Disney cruise short film had Paul Rudd's Ant-Man start to explain why the plan wouldn't work before The Wasp cut him off[6].

## How to Use
The format is typically deployed as a smug pre-release prediction for any Marvel film with a big villain, or as a mock scientific explainer covering biophysics, plumbing, or ballistics of the maneuver[1]. Common conventions include the phrasings "just crawl up his ass," "rapidly expand," and the hashtag #flushanantman[6].

## Frequently Asked Questions
### What is Ant Man Will Defeat Thanos By Crawling Up His Butt And Expanding?
A Marvel fan theory joking that Scott Lang could kill Thanos in Avengers: Endgame by shrinking to microscopic size, entering the villain through his anus, and expanding back to full size[1].

### Where did Ant Man Will Defeat Thanos By Crawling Up His Butt And Expanding come from?
The specific butt-entry wording came from Redditor u/bigblackhotdog in r/marvelstudios on March 16, 2018, building on earlier Ant-Man expansion jokes by u/iwasherenotyou in December 2017[2][4].

### What does Ant Man Will Defeat Thanos By Crawling Up His Butt And Expanding mean?
It's a joke solution to the Thanos problem, nicknamed theThanus Theory, mocking the elaborate Endgame plot by suggesting a one-step size-change kill using Ant-Man's Pym Particles[1].

### How do you use Ant Man Will Defeat Thanos By Crawling Up His Butt And Expanding?
It's typically deployed as a pre-release prediction for Marvel villain fights, a mock biophysics explainer (as Mel Magazine ran with MIT's Alex Klotz), or a copypasta ending with #flushanantman[1][6].

### Is Ant Man Will Defeat Thanos By Crawling Up His Butt And Expanding still popular?
It's a classic Marvel joke from the Endgame era. Disney nodded to it as recently as June 2022 in a Paul Rudd short film on their cruise ships[6].

## References
1. [https://melmagazine.com/en-us/story/avengers-endgame-thanos-ant-man-ass-theory-science](<https://melmagazine.com/en-us/story/avengers-endgame-thanos-ant-man-ass-theory-science>)
2. [https://www.reddit.com/r/marvelstudios/](<https://www.reddit.com/r/marvelstudios/>)
3. [https://tanjonathans.tumblr.com/](<https://tanjonathans.tumblr.com/>)
4. [https://knowyourmeme.com/memes/ant-man-will-defeat-thanos-by-crawling-up-his-butt-and-expanding](<https://knowyourmeme.com/memes/ant-man-will-defeat-thanos-by-crawling-up-his-butt-and-expanding>)
5. [https://www.amazon.com/Revengers-Buttgame-Antguy-Thamos-Then-ebook/dp/B07QMXBFTL](<https://www.amazon.com/Revengers-Buttgame-Antguy-Thamos-Then-ebook/dp/B07QMXBFTL>)
6. [https://x.com/i/status/1542333632911593472](<https://x.com/i/status/1542333632911593472>)

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