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1.
Hot young women between the ages of 16 and 20 something.
Guy 1: God damn, look at all these hot girls.
Guy 2: Haha! You sure do love the tighties, you never change man.
by LondonOntGuy May 01, 2007
 
2.
a slang term for a girl who is extremly under age.
used by 20+ year olds to define 14-17 year old girl.
"oh, check out those tightys man"
"wassup tighty how you doin."
by andara one January 14, 2006