A biker who starts road rage for other cars' minor driving faults.
It was coined by the motorcycle training youtuber DanDanTheFireman.
Typical Motorcycle Karen behavior includes:
Speeding, aggressive lane filtering, wearing no gear, stunt riding, rev bombing, honking, mirror punching, weaving at cars, acting like police officers, following cars to "confront" the drivers, lifting up the helmet's shield and yelling, having a GoPro mounted on the helmet, uploading "this car cut me off" clips on YouTube
*bikers vs people video compilation playing*
Biker: HEY!! YOU JUST CUT ME OFF!!
Old lady in a Prius: Oh my God, I am so sorry
Biker: I GOT YOU ON CAMERA! I GOT YOU ON CAMERA! FUCK YOU!!
someone watching the video: damn, that dude really is a Motorcycle Karen