1 definition by The Riveters
The act of men sitting with their legs so widely spread that the person next to them has an estimated 0.5 seat left and can, also, take a fairly accurate guess at the size of their genitalia (which, newsflash, is generally not in need of a 20 cm leg-gap, don't flatter yourself).
"I have an armrest-sized-bruise because the guy next to me was manspreading so much that I had my thigh squished into the armrest the entire busride"
by The Riveters January 19, 2016