look up any word, like guncle:
 
1.
When two people touch bare bottoms and blow botty kisses.
"humphrey that was a lovely truffle kiss, it made me feel all warm and fuzzy inside..... literally!"
by DICKYWIPES August 20, 2009
 
2.
When two people kiss after eating chocolate - in this way the kiss is like a truffle and has a lovely chocolate taste.
"Do you want to truffle kiss?"
or
"I saw those two kool kats truffle kissing the other day."
or
"Hershey's chocolate is the best to truffle kiss with."
by Hazelnutmegan December 28, 2006