Top Definition
Confirmation that a girl is indeed wearing a thong. Suggests that the girl in question has a "sexy" side.
"I was going to ask her out, but first I needed some thongfirmation."

"I hate VPL, but I love a good thongfirmation."

"Yo, is that girl a slut or what?"
"Dunno, no visible thongfirmation."
by paudansch October 31, 2011

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