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1.
the proper time for consuming crack cocaine
thug: what time it is?
gangsta: crack thirty
thug: yeah boi
by brotographer March 20, 2010
4 1
 
2.
Time of night when crackheads are out on the streets. Usually used to imply a scandalous or shady time of night, like 3 AM in the ghetto.
Some bitch woke me up last night at crack thirty in the morning just so he could score a gram off me. What a punk.

alternately:

We can't ride the subway at crack thirty in the morning, we'll get mugged!
by DoktorJ December 15, 2005
5 2