Top Definition
Someone who absorbs banter, but fails to return the banter.
Adam: What's the national sport in Romania? Bear baiting?

Dan: No. It is football. That is so racist.

Adam: FML! You're such a banter sponge!
by KirtjE October 18, 2011
Someone who sucks all the banter out of a situation
"Hey ,I have to do homework!"
"Don't be such a banter sponge"
"You're gonna cause a BANTERSPLOSION!!!
by Agent Obvious April 19, 2015

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