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1.
When you go for a day or so without brushing your teeth, and the texture in your mouth feels like your teeth are wearing fuzzy little sweaters.
"Does anyone have gum? I forgot to brush my teeth this morning, and it feels disgusting."
"Oh, you've got tooth sweaters?"
by Cara Dee December 07, 2008
 
2.
The warm coat left on your teeth after giving a blowjob.
"After taking my man juice's moneyshot last night I woke up this such a tooth sweater."
by Moneyshotman February 04, 2010