Grown on Concrete 

Rude and abrupt in nature

People from New York are just mean; it's like they were grown on concrete.

Grown on Concrete by Jaubrey September 6, 2009

Concrete Pizza

A concrete pizza occurs when plant matter such as grass and leaves finds its way or is placed onto a concrete or cement surface before it dries. For added effect, one may put tomatoes, onions, and even pepperoni in the mix. If a sealer is applied onto a concrete pizza, it is then known as a complete concrete pizza.

WARNING: Concrete pizzas are not edible. Consumption will result in dental damage, esophageal lacerations, digestive system shutdown, and probably death. If ingested, contact Wendy Northcutt from the Darwin Awards immediately, because you would be a serious candidate for the award.

Note: Concrete pizzas can be ugly and structurally weak; customers are highly unlikely to pay for them.

"The customer was not very impressed by the concrete pizza on his porch, and was even less impressed when we sealed it with tomatoes and onions.

Concrete Pizza by CapitaoChaos April 24, 2014

five times harder than concrete 

Something very difficult. Based on the rescue from the Beaconsfield gold mine in Australia where the rescuers encountered rock said to be times harder than concrete.

That exam was five times harder than concrete.

five times harder than concrete by diggler2002 September 6, 2008

Green Cheek Conure

A green cheek conure is a small parrot of the family conure. they have long red tails, yellow bellies with red splotches and, of course, green cheeks. they are very energetic, and if you train them not to bite you, they will be very docile. you must play with them for at least 20 minutes a day. they are highly allergic to avocado, and if they eat it, they could die.

"Dude, what's that big red scratch on your face?"
"That was my new green cheek conure."
"You know you have to train them, right?"
"Oh..."

Green Cheek Conure by AiraSkye August 20, 2011

i concur 

To agree with!

I concur with your medical examination!

i concur by ThePhoon August 10, 2003

Take a Concrete pill 

Harden Up

Man That Guy Needs to Take a Concrete Pills and Harden The Fuck Up

Take a Concrete pill by Rugbyfan69 June 3, 2009

concrete general

Simply put, the boss of the street; controls the flow of commodities and/or whores on the street.

A: shit son, make way for the concrete general.

B: y'all know who I am!

concrete general by T. Polkinghorne March 23, 2008