Internet term. Verb. To invalidate your position in an online debate by making thinly veiled threats against the life or sexual dignity of your opponent's spouse or child.
A classic frisching: "If some nutcase kidnapped your child tomorrow and did to him what was done to your fellow Coloradan, Jon-Benet Ramsey, I wouldn’t give a damn."
Krystal: "Chris SAID he's picking me up at 6, but he operates on Frisch Time so that means 8. I guess I'll have time to call Timmy over for a matinee."