1. A nickname for a white girl that is gangster in her own way; not the typical badass gangster way but a way that is unique and says she won't take shit. Girlslice's sometimes wrongfully hate USC, can be dorky in an awesome way, and are often named Meghan. It can also be used in a goodbye as in "Peace out Girlslice."
1. boy: "i'll talk to you later girlslice."
girlslice: "keep it fresh jmoney. FUCK USC."
2. drunk idiot: "that girl is a dork man."
less drunk man that's not an idiot: "You're an idiot bro, she's awesome. She's a girlslice. I bet her name is Meghan."