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1.
1. The front of an album.
2. Opposite of the B-side.
3. The most popular song on a 45 was usually the A-Side
The A-side of the album had the best song on it.
by Mass Chaos October 29, 2003
 
2.
popular person
"We are the only A-sides at this party."
by Anonymous April 08, 2003
 
3.
The front side of a woman/girl
Veginal fucking
Natural Straight Fucking
Her A Side is boring and loose,
I played my girls A Side last night, it was brand new - I played it for the first time.
by Sameer July 08, 2004
 
4.
Previously Spelled "Ass Hides" . def, People Who hide from women with enormous asses.
"Yo man don't be an A-side, go get them homey"
by GreatMan Riding Bucket August 07, 2003