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A party of one or more featuring multiple and prolonged bouts of self-pleasure.
Where is Jeff?
He's at home, probably having a Jackfest.
by Tom Cioccone January 26, 2011
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2
1. A situation where way too many people are doing nothing and getting in the way and there is a lot of waiting around.

2. A situation where everyone is raining praise on eachother.
1. The DMV is a total jackfest.

2. The board meating was a total jackfest
by hititlong January 04, 2006
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