n. refers someone's ugly teeth. typically these teeth are covered in a brownish yellow tinge and/or what looks like moss. These set of chompers are an eyesore to look at and may induce vomit.
Commonly used as a nick name for someone with really disgustingly, gross teeth.
WOw that guy's got da teef!!
You: What's up, Da Teef??
Person w/ disgusting teeth: Nothing