Tbh it was probably a typo for "OML"
"oh my lord"
OMM that's hilarious! Which would make more sense with OML however we all make mistakes and "L" and "M" are fairly close!
by Beckywiththebirdsnest May 7, 2017
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Oh My Marshmallows! This is a new version of OMG for those who are Aethiest and have a sense of humor, that do not wish to use Oh My God!
OMM! That was the best meal I have ever had!

OMM....thats horrible!
by O-M-M September 9, 2010
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A ugly bitch that spends there whole life trying to learn tik tok dances
Omg she is such a omme, she’s been trying to learn renegade for weeks
by ♥︎☀︎☆ June 20, 2020
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One of the most Disgusting schools on the Planet. Filled with Drama, and fake people, and the Administrative Staff don’t know what there doing.
Eww. you go to OMMS. I’m praying for you.
by AnonymousJesus. May 22, 2019
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