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1.
1. A hot girl that guys usually fall for.

2. Someone who is really good in relationships and will probably be your best.

3. A good kisser.
1. "Man, I totally fell for that Affy at the party"

2. Dude 1: "Why did you break up with that Affy?"

Dude 2: "I dont know dude, she was the best."

3. "On a scale from 1-10, that girl was a Affy!"
by bigtwo987 June 06, 2011
 
2.
A slang word meaning 'good'. A synonym for 'nang' or 'sick'.
That party last night was affy!
by maffyew May 26, 2007
 
3.
A short form for "Affiliation" used on websites.
Hey, wanna be my affy? :D
by chirisu June 23, 2009