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An urban term (used mostly in the midatlantic area-originated in Delaware) used to describe laughing or shared laughter. To bag up, bagged up, etc.
That guy was walking down the street and ran into a pole, and we started baggin' up!
by TTWhy February 10, 2009
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2
Laughing out loud at something.

I've never heard this outside of Delaware.
"I started baggin up when I heard my teacher's name was Mr. Doody"
by Drake Dwornik May 11, 2004
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