river jet 

A egotistical cunt that thinks he is better than he really is.

Look at that man, he’s such a river jet

river jet by hashtagretweet October 20, 2017

Jet Rider 

A jet rider is someone, most likely of the female population, that uses the jets of a bathtub or hot tub, or others of the sort, to masturbate.

Carl: Yo, I was at the pool the other day and I saw a jet rider.

John: What the hell is a jet rider?

Carl: You know, someone that gets off using the jets

Jet Rider by Jsizzlac March 26, 2009

Jetpack Joy rider 

A person who free rides in a group activity or project and doesn't engage or contribute. Characterized by being aloof, insecure and apathetic.

Steve was frustrated by his school project group. Only he and Andy were contributing ideas - Larry kept staring at his phone and being a Jetpack Joy rider.

Jetpack Joy rider by Truedad October 2, 2014