When you put both your feets on concrete, it turns into concretes.
My two feets on concretes
by papppii April 12, 2010
to concrete is to have a good time with friends
We had fun concreteing this weekend, didn't we?
by Abby Suns July 10, 2008
To spend quality time with your closest friends
Hey, do you want to concrete after school today?
by Travis McCown June 13, 2008
Used to describe ones hard-on and the process of getting a hard on.
Describe: Dude that chick gave me some major concrete.

Process: I'm mixing some major concrete right now.
by The Neutrachrist October 29, 2005
what janitors mow.
or at least at my school.
...and he was MOWING THE CONCRETE

concrete, you are pwned!
by swing low satellite March 09, 2005

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