A skank or skanky broad shouldered person that crosses boundaries (even more so when drinking) that results in unwanted ass grabbing and other physical contact. Mostly the victim is men in relationships..
An "assgabbler" is a person who continually gets pushed around by his bandmates, gets used and abused, lets others take credit for his songwriting, gets teased in front of hotties, and continues to take it because "everyone else in town only likes techno."
The practice of, or engagement in, grabass. It is also commonly known as screwing around or even flirting. It usually occurs when people have too much time on their hands.
Steve: "Did you hear about Charlie and his hamster?"
Jane: "Sure did - that must have really torn some stuff up, huh?"
Steve: "I guess... that's what you get for bein' an assgrafter."