Top definition
When more gum than tooth shows in your smile
"Ugh, what an ugly smile, horrible tooth to gum ratio."
by Just The Facts April 16, 2006
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2
the ratio of gums to teeth in a person's mouth.

If someone has large gums and small teeth that is bad tooth to gum ratio and vice versa.
"Damn his smile is kinda scary, it looks like he has baby teeth and adult size gums - total bad tooth to gum ratio!"
by BeanSprout December 16, 2011
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