A BMX bike with a sidecar-like device attached to the frame of the bicycle. This makes BMX bike riding a shared experience. The person that stands in the sidecar is called a monkey while the person steering the bike is called the pilot. This concept was introduced on Rob Dyrdek's Fantasy Factory in the episode "Trust Your Pilot, Respect Your Monkey".
by Mighty_Arrow October 15, 2010
A stealth form of male masturbation performed while wearing pants, typically in a semi-public setting such as a movie theater or while driving. In order to sidehack a man must first position his penis along his inner thigh. He will them stimulate the penis by rubbing or stroking his inside thigh through his pants.
by sidehacker October 2, 2006