Top Definition
Sex clock is a phase used when to have sex in early hours of the day

it could be 4pm "look its 11pm on the sex clock"
i see its 11pm on the Sex Clock, time for bed
by TobyGirl September 21, 2008
1 more definition
The countdown from when you expect to have sex to when you actually have sex.
Yo homie! I was chillin at my gf's place and my sex clock was over an hour! not par!
by Spence Is Superman December 09, 2011

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