A term coined from the movie "Clueless", describing that something is so sweet, too sweet, that it causes someone to have a toothache.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

To punch or kick someone in the mouth

Pedoslang for an erection attained by the enjoyment of "hard candy"