A Kavanaugh is a person lying to get out of a bad situation.
Brett : I did not rubb my di*k against her !
Random dude in the jury : Wow , he's such a Kavanaugh, ya know!?
N. Slang for the act of raping someone while they are inebriated and/or defenseless
"Hey man. I hear Cole pulled a Kavanaugh on that girl at the party."