One Upper 

Of or relating to a person always trying to outdo or claim that their experience was better without regard to whether it actually was better.

Torrey said that he had an excellent vacation in South Beach. Andrea then chimes in and says she had a better vacation in Iowa. This illustrates a one up and a one upper.

One Upper by JRoddd April 11, 2009

One Arm Yogurt Thrower 

Male genitalia. A penis. ( penis )
Throwing yogurt is a reference to ejaculation.

"I bought some viagra for the one arm yogurt thrower"

One Arm Yogurt Thrower by 12AA34FF May 13, 2006

One Tweet Wonder

Sending one tweet then you're done.

There is a great article today on the Slate about one tweet wonders.

One Tweet Wonder by Tinkerbell Hilton June 8, 2009

one size fits all 

(Phrase) With only a tiny minoritory of exceptions, everyone should be happy with the decision.

Hitler commiting suicide was a one size fits all action

one size fits all by Gumba Gumba May 15, 2004

One of those guys

This is said in reference to one who masturbates with bubble gum...

Oh, so he's one of those guys.... you know the type they masturbate with bubble gum

One of those guys by The Great One April 22, 2004

One Man Band 

The act of someone performing fellatio while simultaneously sticking their finger (or two) up your butt.

Greco: That bitch from last night was nasty- she gave me the one man band in the back of my car.

Hung: I know dude, I was driving.

One Man Band by DaddyPants July 22, 2008

one hundred dollars 

A rebuke for doing or saying something rash or thoughtless; also clumsy. Originated from something costing this exact amount being roughly handled.

Chad throws a bottle of hot sauce to Mike and it splatters all over the carpet. "One hundred dollars!", Mike yells.

one hundred dollars by Dr. Kaos June 17, 2008