The jonas sidecar is a sexual act, which technically maintains everyone's virginity promises. With a ring on his left ring finger, a guy promise-ring-fingers a girl and masturbates with their right hand. The guy ejaculates onto the bed next to the girl (sidecarring her). The act is completed by offering the girl gas money in the following manner: "I've only got a 5 and a 20. Do you have change for a 5?"
by gaper27 January 25, 2010