Gentleman's Bet 

A wager on principle rather than for significant amounts of money.

A typical Gentleman's Bet will be for no money or a nominal sum (e.g., $1) with the "prize" of being correct going to the winner. Think of Trading Places and the bet the Duke brothers made.

Gentleman's Bet by thesellman April 16, 2014

Gentleman's Sweep 

When a team wins a playoff series, but loses one game in the series. A team is said to have "let" the other team win one game before sweeping them.

"5 Games. Book it. Gentleman's Sweep" -/u/Indianmirage

Gentleman's Sweep by CurryMustard May 4, 2014

Gentleman's Necktie 

A cock ring, constrictor band or other device used to squeeze the penis to engorge it.

Sheena loved getting Carl's engorged cock after he slipped on a Gentleman's Necktie.

Gentleman's Necktie by Eaton Holgoode February 22, 2015

Gentleman's Six Pack 

The Gentleman's Six Pack is the classiest of all evenings a man can enjoy. By definition, it is 7 beers, one more than a six pack. In real world application, it is having one more beer than a man should have had on any given evening.

A: "Dude, you alright?"

B: "Sure man, I just had a gentleman's six pack."

A: "Let's get you some tang, brah."

Gentleman's Six Pack by Tommy Handjob February 8, 2009

Gentleman Bastard 

A man who will say and do things in a very refined manner, but what he says and does are truly horrific things.

In The Dark Knight Rises, Bane was a gentleman bastard.

Gentleman Bastard by restrictionenzyme July 31, 2012

gentleman and a scholar 

Exclaimed when some one goes out of their way to do something beneficial to you and others with you.

John: Fuck, I don't have enough money to buy weed for tonight.

Jack: Worry not friend, this bags on me!

John: Jack you're a gentleman and a scholar!

_________________________

Bill: Fuck man, I haven't been laid in WEEKS!

Jack: Fret not, chum. Take my woman!

Bill: You're a gentleman and a scholar!

_________________________

Larry: Oh fuck, I'm getting a drug test today.

Jack: *zip*

Larry: Jack you really are a gentleman and a scholar!

gentleman and a scholar by ScholarofaGentleman May 5, 2006

Gentleman's Wash 

To hastily clean your manhood in the basin of a pub’s toilets in preparation for a forthcoming sexual act with someone you’ve just met.

Dave hoped the bird he was giving a ride home to would give him a blowjob on the way so he had a gentleman's wash

Gentleman's Wash by tropical July 16, 2008