Manspreading is the practice of a man sitting with his knees flared far past his hips on a bus or train, taking up two or sometimes three seats' worth of space1. The word packages a specific gripe of urban commuters, mostly women, into a single sticky label that could be used in a headline, on a protest sign, or in the caption of a covert subway photo2. Part of why the term traveled so fast is that the visual is instantly recognizable: knees at forty-five degrees, phone in hand, an invisible force field of thigh blocking the seats on either side.

The format that grew up around the word is mostly documentary. People snap photos of offenders on trains, post them to shaming accounts, and let the picture do the arguing3. Riffs on that base template include Photoshops of men sharing the pose with cats slotted between their knees, art-school responses like anti-spread chairs, and news-desk explainers dressed up as sociology45. The tone slides between earnest complaint and open trolling, which is why manspreading became one of the earliest gender-politics words to be adopted by both feminists and the men's-rights internet at the same time.

The manspreading label is typically used in two modes. As a photo caption, it accompanies a candid shot of an offender on a train or bus, often with a wry one-liner about square footage or, as Gothamist put it, whether there is enough room between the knees for "a litter of puppies"3. As a rhetorical jab, it gets dropped into arguments about gendered use of public space, sometimes sincerely and sometimes as bait, which is why Urban Dictionary entries for the term swing wildly between straight-faced feminism and openly hostile parodies13.