"F*ck, Kirk! Come on! Throw the ball!"
Vikings superstar Justin Jefferson UNLOADED on his quarterback, Kirk Cousins, after an errant throw during Sunday's game ... and the wideout's mini-rant was all caught on a hot mic.
Here's the deal ... in the 2nd quarter of Minnesota's 33-27 loss to Chicago -- Jefferson was open in the back of the end zone for a touchdown.
The problem? Cousins was scrambling to his left and couldn't make an accurate throw -- leading to an incompletion.
Justin -- who's absolutely BALLIN' OUT in his first year in the league -- was NOT happy about it .