A motorcyclist or cyclist who rides on the streets as if they are a track. Often, this is the same type of person who is going to crash and wind up wrapped around a light pole looking like a squid.
Cyclist 1: Sick spandex brah!
Cyclist 2: Thanks brah! Hey, you wanna run that red light because we're too fast for it?
Cyclist 1: Sure thing brah!
Pedestrian: Watch out you fucking squid!