french dennis 

an erotic act in which a female parts the hairs of the recipient's anus and then places their chin into the anal cavity, making it appear as though they have a french mustache.

EX.1
"dude did you see that girl i hooked up with last night she was hot"
"she was all right, but didnt it bother you that she had a cleft pallet"
"not really she gave me a french dennis and i couldnt see it, she kinda looked like cap'n crunch"

EX.2
"hey cecil how was your weekend?"
"you wouldnt belive it, bernice gave me a french dennis, then we watched spanglish while wearing davey crockett hats and 3-D goggles"

french dennis by bryant gumbal's frontbum November 8, 2007

french dentist 

When someone rubs toothpaste on their teeth with their finger to freshen their breath because they don't have a toothbrush or chewing gum.

Jeff: Hey does anyone have any gum?
Jean-Pierre: No sir, but I have some toothpaste in my pocket, you can use it for a French Dentist.
Jeff: Get away from me you filthy French animal.

french dentist by AlexanderTehGreat January 2, 2017