Dick Cheney -- Rappers Can't Rock Cowboy Hats

Dick Cheney is sure of many things, among them ... cowboy hats won't be the next rap trend anytime soon.

The ex-Vice Prez was out in Downtown D.C. sporting a pretty spiffy ten-gallon ... and when we asked why more rappers don't wear them -- Dick had a pretty good answer.

We also asked Cheney if he ever forgave Kanye West for saying George Bush didn't care about black people while they were in office.

Only problem, Cheney kinda pulled a "Kanye who?"

At least we know Mike Myers will never forget.