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1 definition by Classy1114

 
1.
Hooking up refers to having sex, messing around refers to anything else (mostly beneath the waist) and making out is just making out. Done. Hooking up is having sex with no expectations or strings attached.
I was hooking up with this guy last night... means i was fucking this guy last night.

I was messing around with this guy last night... means I was giving him head/ he was going down on me.
by Classy1114 October 21, 2009