O.S. Bar 

The handle bar that is on either side above a seat in a car, that is used when the driver makes too sharp of a sharp movement with the car, such as a sharp turn, and the passenger or passengers usually say, "Oh Shit!" and grabs onto that bar. Hence "O.S.".

Driver: "Grab onto your O.S. Bar!"

Passenger: "What?"

Driver makes a sharp turn

Passenger: "OH SHIT!"

Driver: "Told ya."

O.S. Bar by makoli May 16, 2009

Dirty Salad Bar 

When you dry your face with the same towel a friend uses to vigorously rub his pubic hair, general pelvic area and gooch.

(Four friends sitting on a couch watching you wipe your face)

"Haha! Dude how's that towel smell?" (Dudeson 1)
"What...uh like my wet skin I guess." (Dudeson 2)
"That's strange because it says here you just paid $5.99 for your meal at the Dirty Salad Bar!" (Dudeson 1)
"Ughhh! Not again!" (Dudeson 2)
"HAHAHAHAHAHAH" (Couch potatoes)

Dirty Salad Bar by Meehoobee November 30, 2009

cash bar 

a bar where you have to pay for the drinks yourself, as opposed to "open bar".

Janet and Melanie's going-away drink thing is cash bar :(

cash bar by Ye Wang June 1, 2006

space bar 

That thingy a lot of people don't use when they should

Hit the damn space bar once in a while!

space bar by Arizek November 30, 2004

Dawson bar 

The curved bar that connects the vertical base of a football goal post to the horizontal cross bar. Named for Cleveland Browns kicker Phil Dawson, who twice hit the Dawson bar with monumental field goals during the 2007 season.

Klaus von Schlabe won the game for the Wildcats when his 45-yard attempt slipped over the cross bar before hitting the Dawson bar

Dawson bar by JohnInCleveland January 6, 2008

z-bar 

n. slang. A pill of xanax.

We drank some beer, took some z-bars, and i pretty much can't recall shit after that.

z-bar by obie October 24, 2003

Kentucky klondike bar 

The act of freezing a bowel movement and sexually penetrating another with the frozen bowel movement.

A person has the option of following a Kentucky klondike bar with a Panamanian petting zoo.

I gave my secretary a Kentucky klondike bar last night for about five minutes. When it started to get soft, I gave her a Panamanian petting zoo.

Kentucky klondike bar by Dirty Snatchez August 9, 2006