When you are having sex with a girl and,without her expecting it, you stick it in her ass. When she turns to look at you with that "What're you doing?" expression, you say "Oops!" and start railing her in even harder in the ass.
when you are hitting it doogie style, instead of going in the cutter, you shove it in her butt and when she turns around with a suprised expression on her face, you say, "oops"
A one word euphemism for sexual intercourse, especially regarding drunken and unplanned encounters and/or one night stands. Seen mostly in text messages sent to one's best friend the day after commiting said drunken act.
sms from Brook to Jake: "Oops."
sms from Jake to Brook: "Who'd you fuck."