Hooking up is used to describe a sexual encounter (vaginal, anal, or oral sex) between two people who are not in a dating or serious relationship and do not expect anything further, their study says.

What does hookup with girls mean?

Hooking up means kissing, making out and oral sex. Does not include having sex. Hooking up means anything BUT sex. Some people use to for just making out, but usually its used for oral sex. Anal sex.