Top Definition
An especially compelling conversation or screen name that triggers intense and short lived reaction in a chat room.
BarbEdoll: Yeah, I can pretty much stick anything down my throat and not puke!

Katie1234: Jeepers, Barb, you know that whenever you bring up your lack of gag reflex it's like chatnip to those horny pervs.

Herpes From Toilet: Sadly, i never knew what those paper thingys in public restrooms were for.

Thaddeus: Lolz, that's gonna cause a flare up of chatnip.
by Princess Slayah July 17, 2009

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