To be going through withdrawals usually associated with drugs. More specifically marijuana.
Got any pot Pip? I'm jonsen.
by Dudeman January 10, 2004
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Jonsen. Short for Jonesing. Exhibiting a craving for something while going through withdrawals. Could be interchangable with buggin.
Man, I am really jonsen for a beer.

Damn dude, you are really jonsen over that girl, get over it, she is done with you.
by TraceJ May 29, 2019
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Jonsen pronounced (joan + sin) is to be boo loving or communicating with someone you like in a sweet way whether in person or on the phone... etc
Tisha need to stop jonsen on the phone with her boyfriend.
by Betty Boopi September 25, 2006
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Dropping Acid and taking Amphetamines at the same time.
I spent eight hours on this one frame for my animation, I was totally Chuck Jonsen!
by The Electric Order December 9, 2010
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