When two people (opposite or the same sex) hang out and do any of the following: make out, sleep together, go to 2nd or 3rd. It is always really vague what the person has done as it is meant to be. Hooking up has replaced mainstream dating....It's no longer, omg
when will he call, but....omg, that was awesome, i wonder when he'll ask me out after the last said hookup.
Last night me and Matt hooked up...I wonder if he'll come over again tonight, because that was amazing.