Top Definition
A part of your body that doesn't tan because it's blocked by fat.
"We should go nude tanning"
"I can't go! I'll have too many fat-lines"
by WonderlandAlice September 16, 2012

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a fat line of cocaine

usually lined up with a razor, credit card or other such straight object

possibly on top of a mirror..
"Fat line"

makes me want to do a "fat´╗┐ line" right now
by Coach- Archaon February 08, 2011

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