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1.
Acronym for: Orgasm In Your Mouth. Usually used to describe a pleasing taste.
"Hey Zac, have you ever tried chocolate pie?"
Zac: "Oh my god yep it's like an OIYM"
by rockthisworld December 12, 2011
 
2.
an acronysm for "orgasm in your mouth," used to describe such delicious food that it's better than sex.
I had dinner at Cami's last night and her cooking is totally OIYM!
by CamiRae Walter April 14, 2013
 
3.
Orgasm In Your Mouth Steak
Cole took some steaks and put them in a lake of black shit then cooked them up good. OIYMS is making my mouth jizz everywhere and I think i might drown!
by nasty-macminnville February 15, 2011