Another euphemism for slut; a girl who fucks everyone, therefore sucking up everyone's cum like a sponge
Clueless Guy: You're not gonna believe this! I scored with Destiny last night!
Regular Guy: So did like 7 other guys. She's a total cum Sponge, dude.
Someone who tries to steal another's thunder by shifting the attention to themselves; e.g. get the laughs from a joke by butting in with the punchline, or taking over a story in progress.
Michael Scott is the ultimate thunder sponge in the office; he always has to be front and center.
A pelican
Now introducing the brand new BP Sponge! Soaking up most of the oil in the Gulf right at this very moment is the new and very outstanding powers of the BP Sponge!
Fucking a monstrously fat chick in the ass.
T:"Hey J, your sponge pudding is waiting for you behind the dumpster."
J:"Cheers"
A person that tends to unknowingly adapt to be like a person or group of people that they talk to, mimicking their patterns, personality and appearence. A conformist.
Person 1: Is that Katie with the jocks? I thought she was one of the art geeks!
Person 2: Yeah, she switches to the social group of whoever she befriends, she's a total social sponge.
Someone who gets songs easily stuck in there head.
Person #1 Breezy has been stuck in my head for hours!
Person #2 You are such a song sponge
To invite friends to a party and then not show up or show up and leave early
If you were to you tell your friends about a party, then don't show up and say it's because the stars didn't align so you're feeling tired, then you could expect your friends to were Sponging-out