A tassle which you attach to you bottom. Much like those of which are on little girls' bikes. If you have one per Bum cheek they are called Chassles.
No Jimmy those aren't Tassles for your bum. Those are Assles.
by MissAwkward July 18, 2011
v. To transmogrify into an asshole or to imbue with assholish tendencies through repeated contact.
BigDic91 used to be a nice guy, but #Domsandeasywenches assled him.
by stolensnark February 10, 2007
Basically another meaning of an extreme asshole.
Damn, he stole my bike! What an assle!
by Bighawk April 21, 2004