Hooking up encompasses any type of sexual activity, from kissing to oral sex to sex -- although, usually, hookups tend to be on the lighter end of that spectrum.

What does hooking up actually mean?

Hooking up means having some sort of intercourse, whether its oral anal or vaginal. Having oral, anal, or vaginal intercourse, usually spur of the moment with a new partner. Hooking up means any sexual act with a partner of either gender.