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!"