An over priced old rock that gets you laid until the effect wears off. Bigger is better.
My girlfriend wouldn't have anal sex with me until I gave her a diamond ring.
by jam June 23, 2003
n. Relatively common mineral, consisting of carbon, which is similar in appearance to zircon or cut glass. Used by the South African based De Beers company as a form of emotional blackmail through clever, original, and socially planted marketing techniques. It is asserted by the De Beers company that a man who is unwilling to waste a huge amount of money for a worthless piece of carbon must not really love his future wife very much.
(See also organic food.)
"Diamonds are a complete scam"
by Zamzara October 10, 2007
A guy who ditches all his friends to fall in love with the first girl he sees. In most cases you will go months at a time without seeing him, but he will make facebook appearences stating his dying love for this girl. Every 4 minutes.
Ya, Thad saw that girl at the party, she was hefty and he's still being a Diamond.

Did you see Eric's post on facebook, I was hoping it wasnt so but we wont be seeing much of that Diamond anymore.

You think that chick turned Roy into a Diamond?
by Ryan Yeagggggglleeeyy May 04, 2013
Known as girls' best friend
Girl: Honey can you buy that diamond ring for me?
Mike: No!
Girl: Cheapass povo SOB!
by mysterious_writa September 25, 2004
Referring to a black diamond trail on a ski mountain.
Snowboarder 1: Hey man, these trails are way to easy.
Snowboarder 2: Yeah, I'm no gaper. Let's go shred on a diamond.
by bheit December 23, 2009
To describe when something is beyond cool, beyond ligit, or just precious.
"DUDEE! That jacket is sooo diamond;"

"Man, that girl Nina's so diamond..."

"Yeah then Mr. Rosenau totally fell down the stairs and smashed his face!"
"Hahahhaha, that's diamond."
by Crackkbaby February 13, 2008
This is for use when something is beyond brilliant!
"We was down the pub an this chav gets his tracksuit pants ripped off on this nail... he's standin there in his all-together with his London Pride innis hands... it was Diamond!"

"What? She said yes? Diamond m8!"
by George Friendly October 12, 2006
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