Top Definition
acronym for Signs You May Be Fat. Used whenever someone thinks s/he's fat because of how much s/he ate or what s/he ate. Also used whenever s/he's feeling guilty about eating something or how much food was consumed.
"SYMBF: I just ate my daily calorie intake before 11am"

"SYMBF: When your bedroom is a Bermuda Triangle for dishes and Chinese food boxes."
by omgitskg November 27, 2011

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