The general rule of thumb for identifying the Mamet dammit is if after the movie, you look back and think, "Wow, there was a lot of cursing in that movie." If you didn't notice the profanity, it wasn't the Mamet dammit.
Practitioners of the Mamet dammit include Quentin Tarantino, Brian De Palma, and Kevin Smith.
"Look, just because I wouldn't give no man a foot massage, don't make it right for Marsellus to throw Antwan off a building into a glass-motherfuckin-house, fuckin' up the way the nigger talks. That ain't right, man. Motherfucker do that to me, he better paralyze my ass, 'cause I'd kill'a motherfucker." -- Quentin Tarantino, "Pulp Fiction"
These are two examples of the Mamet dammit, one from the master, one from the apprentice.