1. The act of looking at child porn. (see Dan Quail)

2. Being a really cool person. Also used as a substitute for ballin'

Definitions 1 and 2 are often mixed up, be careful
1. This guy I knew was Quailin' last night! What a freak!

2. Person one: "That guy is totally Quailin'! What an awesome dude!"

Person Two: "Wtf. You have some fucked up heroes."
by DanInDisguise February 2, 2010
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Quailin means that one friend that’s truly riding for his/her friends and catching every wave they send him/her, both good and bad.
“Bro, thanks so much for always being a Quailin! Wouldn’t know where I’d be without ya!”
by Missyq June 7, 2020
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