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2.
When butt-crack is visible, especially when someone bends over.
Did you see the pants that Sarah was wearing? She had some hardcore Dental Plan going on...

Or Just: 'Dental Plan!' when said butt-crack is visible.
by Chuppa December 06, 2004
 
1.
You need one of these so you don't have to pay for braces.
DENTAL PLAN

Lisa needs braces!

DENTAL PLAN

Lisa needs braces!
by Overcast March 16, 2004