Abbreviation for Seven Minutes In Heaven. A game in which, usually, boys put something of theirs into a bag. The bag is then passed around from girl to girl. The person to who the item they picked out belongs to is whom they must go into a closet or separate area for seven minutes with the lights completely off.
Mia: Your turn!
You: UGH FINE. *picks out shirt* Who's is this?
Matt: Mine! *runs to closet*
You: *in your mind* HELL YES! *also runs to closet*
Mia shuts door + turns off lights.
7 MINUTES LATER....
*door opens unexpectedly and reveals you to kissing*
Mia: That's 7 MIH for ya...