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1.
1. Alternative to the verb "vibing", except "spongin" is vibing with two or more friends.

2. Hanging out with a group of friends.
"What's up brah?"

"Nuthin much, just spongin with my hebros, and shebros".
by Mr. Manchez November 09, 2010
 
2.
Take coolness away from someone or something
why you spongin me?
by superk102 September 26, 2013