To show off or show someone something that may or may not be yours where your only reason for it is to further yourself or to make yourself become "cooler" in the eyes of the person you are showing it to. While actually looking more like a tool for every time you do it.

(Most people who nassel will do it so much that they actually have no idea they even do it!)
-"Hey! Have you seen my TV?! It's 42 inches! Check it out! Hey have you seen my couch!? Hey check out Paul's gun safe and his guns!"......."Chris... Stop nasseling everything you possibly can, especially all my stuff!"
by PWyatt March 24, 2008
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Jana’s husband n the most handsome man in the universe according to 100% of the population
Nassel my man
by Nassers gf June 9, 2023
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