Across his long career as a character actor, Isiah Whitlock Jr has played many roles, but it's his enunciation of one profanity on HBO's The Wire that has come to define him as an actor. 

As Maryland's dodgy senator Clay Davis, his memorable and prolonged catchphrase "Sheeeeeeeeit" has become a piece of pop culture in its own right, with the actor saying he hears it shouted at him whenever he's on the street.

And now it's coming back, with The Whitlock Academy - a web series that promises to teach serious actors how to pronounce the word like Clay Davis. 

In the trailer below, Whitlock can be seen teaching a class of students how to prolong the profanity but the Academy’s Facebook page states the stars will be coming out to "Sheeeeeeeeeeit" like the master soon.