Top Definition
an acronym for the saying sucking on tits mouth full.
ex 1:

dude:hey johnny wut up?
2nd dude:can't talk SOTMF

ex 2:
dude:did you see me kill that noob i lol'd while rofl plus ouch now i'll stfu
2nd dude:no i was sotmf!
by chachi_wan April 14, 2010

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