Riding the Wake 

To immediately follow an ambulance or another emergency vehicle while cars are pulled over to let it pass

I made it to work in record time riding the wake of an ambulance

Riding the Wake by Tapirokapi December 10, 2013

Riding the Pine

In team sports, players not actively participating in the game sit on the sidelines or "ride the pine" until the coach puts them in the game.

Even though he was drafted in the first round, he'll probably be riding the pine for a few games before they start him.

Riding the Pine by talk2me-JCH2 June 23, 2017

Riding the Flamingo 

Riding the Flamingo is when; one moment you are innocently admiring the Flamingo's in the park, the next, your pants are down around your ankles and you find yourself balls deep in pink fluff.

I saw Ross in the park yesterday, he was riding the Flamingo, and it was savage.

Riding the Flamingo by Jizz Maestro October 1, 2017

Riding my ass 

The experience of having a person, most likely driving a large truck or SUV with their high beams on, tailgating you at night when you are clearly exceeding the posted speed limit.

Dude, this chode was riding my ass the whole ride home even though I was going 20 MPH over the speed limit!

Riding my ass by JerryTurnpike May 31, 2014

ridin' on cinders 

when someone drives a car without hubcaps, they are "ridin' on cinder(block)s"

"I saw Pedro's new car today, and it was a real piece of junk!"
"Really?"
"Yeah, he was ridin' on cinders."

Jose thinks he is hard in his clunker, but we all laugh because he is ridin' on cinders.

ridin' on cinders by Stallionaireeee May 11, 2010

thigh riding 

When one person opens their legs, and sits on someones thigh, and proceeds to dry hump said thigh until climax or as a form of foreplay.

David Beckham's thighs are so huge! Perfect for thigh riding.

thigh riding by The Local Lilac December 13, 2016

riding the other bus 

Homosexual.

Usage citation: Dr Who, S04E07 The Unicorn and the Wasp: Donna Noble says:

Typical, all the decent men are on the other bus.

i.e. All the decent men are riding the other bus.

riding the other bus by Llama2 November 13, 2015