Taking a fat dump. Usually refers to a dump that is explosive, or runny. Noise and a deep senses of accomplishment and refreshment often accompany a Jane Fonda.
-"Dude! It smells in the bathroom!"
-"Oh, sorry man. I just did the Jane Fonda."

"Man, that IU student totally smells like he did the Jane Fonda in his pants!"
by sdaddy84 March 27, 2008
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A good way to start a riot
Jane Fonda at the Vietnam Veterans Convention was the guest honor. Hanoi Jane called the veterans baby murderers and losers. She was shocked that the riot started because she wanted to show them her Vietnam trip photos.
by queensburykid August 1, 2022
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