Verb; slang for "to orgasm."
Origin,
2017, United States. First
said by Leigh Daniel Avidan of Game Grumps, Ninja Sex
Party, and Starbomb while playing Sonic Unleashed.
"
Well, you know, I wasn't planning on having little
Johnny, but I
goofed inside of my girlfriend, so here we are."
"Aw, I'm gonna goof all over you!"