Ann Coulter clapped back at Eminem for trashing her on a new Big Sean track, and while her verbal beatdown doesn't have a beat ... it's got plenty of bite.

The right wing lightning rod was outside New Amity restaurant in NYC Friday when she dismissed Em as a homophobic, misogynistic idiot for linking her to the Klan on his verse for "No Favors." He also takes a swipe at President Trump.