OP

In forum terms, OP refers to the Original Poster. The person who began the thread.

ForumGeek911: So yeh, the OP said you were dumb.
OP: That's right, I did!
ForumGeek911: OMG, He just necroposted.

by Matthew Marvin August 02, 2007

bowie knuckle

Much like the movie, The Labyrinth, a "bowie knuckle" is an apple-sized lump in the male anatomy protruding in the groinal region. Particularly emphasised by tight spandex pants, or jeans. See also pud.

Girl: That guy had the hugest Bowie Knuckle I've ever seen!

by Matthew Marvin June 23, 2007