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1.
dried up nut, or semen.
I can't get the center fold to open because its cemented shut.
by Jake and Justin November 10, 2007
 
2.
The word itself derives from the high quantity of low quality cocaine found in the eastcoast North America in the early 2000's. The granular and low grade texture had customers likening the product to cement. The word also comes from the process of making cocaine itself, in Coloumbia, Bolivia, and the other Cocaine nations, a cement mixer or washing machine is often used to transfer cocaine from leaf to liquid resembling cement. Once the product is exported it is then cut with cement, asprin, baby powder and actual pure cocaine.
"Let's not order off of that crappy dealer anymore"
"Yeah that stuff is like doing cement"
"pure cement"

"dayum, hell no, I've been waiting 4 goddam hours for that ratchet hoe dealer to show up with that cement"
by Romano Gerdt May 28, 2013
 
3.
Buzzword of 2009.
Has replaced other colloquialisms such as "wicked and "cool"
(1) Used as an adjective to describe a place person or thing in a positive light.
(2) Used to describe cohesiveness between two places persons or things.
(1) "Dude, I saw you pick up Samantha Addison... That shit was Cement!"

(2) "Yeah man, me and my bro are fucking cement"
by strongbad009 January 18, 2009
 
4.
1.extremely hot weather; caliente
Man its 98 degrees outside.
I know right! its mad cement outside
by Mike Liriano March 28, 2009