Once a Month Munchies. It's that time of the month where you eat everything. Girls usually fall victim to it, but there's always the occasional dude.
by Boner Destroyer August 24, 2016

by leetlekeetle6 February 21, 2019

Abbr: 'oh my mushroom'. An exclamation of surprise.
by pkmnx September 5, 2003

by big daddy1238 September 18, 2018

Abbreviation for “On My Mama”. When saying it aggressively or adding “On God” to it means your supposed on believe whatever the other person is saying when in fact , 98% of the time THEY BE LYIN!
“Man , OMM ima pay you soon as my deposit hit! “
Then added “ON GOD” to make her lie more believable.
Then added “ON GOD” to make her lie more believable.
by Throat Goat 3000 September 17, 2020
