Bad news for Tyga ... Kimbo Slice's son wants to nail his girlfriend -- and there ain't a damn thing he can do about it.
Check out this clip of Kevin "Baby Slice" Ferguson -- a freak of an MMA fighter who's making his pro debut at Bellator 160 on August 26th.
Baby Slice says he's planning a pretty awesome tribute to his father at the fight -- which will culminate with a knockout in Kimbo's honor.
But the best part of the clip ... when we asked him if he digs any of the Kardashians -- and he basically sent out a warning to Kylie Jenner's boyfriend.