goofy smile

silly or ridiculous smile with teeth sticking out.

children were making funny noises with goofy smiles on their faces.

goofy smile by logophile.yza October 8, 2015

gooey smile 

This is what happens when a girl smiles too soon after giving oral sex, thus revealing semen on her teeth.

She gave me a gooey smile, there was no way I was going to kiss her.

gooey smile by brobro December 6, 2007