A masturbation session; jack off festival.
Where's Eddie? He's havin' a j fest in his room.
by killianmurph March 27, 2008
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1. When a group of people are in a office telling lame ass stories.

2. When your doing lame stuff at work you don't want to do.
"What's going on in here?"

"Just a giant J-fest."
by Hodor91 June 1, 2018
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