When you are working on overtime and not straight time.
Employee #1 : Man, I can't believe I got to work eight hours today.

Employee #2 : It don't bother me cause I'm on the big clock.
by Uncle Dewey December 5, 2006
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Used to trick your friends into saying big black cock instead of clock, giving you the opportunity to call them gay.
Person 1: Yo bro I love big black clocks
Person 2: You love big black cocks?!
Person 1: No, I love big black clocks, gay ass.
by Kaiserlin March 7, 2022
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