verb (used without object) Informal.
  1. (of a man) to sit with one's legs far apart, taking up too much space on a seat shared with other people: guys who manspread on the subway.

Origin of manspread

First recorded in 2010–15; man1 + spread
Related formsman·spreading, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018