Simply stated as "myy niggaa," while reenacting the mannerisms of Alonzo Harris (Denzel Washington) from the film Training Day. This phrase is typically used when referring to or speaking with your homey or best friend.
In many cases, the "my nigga denzel training day" GIF or meme may be used when communicating with your best bud over instant messaging.
J: "Yooooo Patrick!"
Patrick: "Yo, what up J?"
J: "Did you see that white girl's soft, thick and fat ass? Isn't it so juicy and ghostly pale? Don't you just wanna stick your nose in it???
"Hell yeah bro, fuck yea"
"myy niggaaaaa" (inserts Denzel meme).