What does ONM mean?
Oh, Never Mind
Other definitions of ONM:
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How to use the term ONM:
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More slang terms:
I Laughed, I Cried, I Spat/Spilt Coffee/Crumbs/Coke On My Keyboard
from the fancy word Plebians who were the roman low class peeps. you can feel pleb or look pleb or just be pleb.