When the coworker that's supposed to take over your shift shows up early and gives you the impression that you're almost off, when in reality you still have x amount of time till you can clock out.
"Ugh, why'd they have to get here half an hour early? I just got clockblocked."
The sound that leaves the mouth of a dyslexic person attempting to say "cockblock"
"Dude, your friend is a major clockblock"
"Wait, what?"
The act of not informing or preventing someone from knowing the time, in most cases for selfish or spiteful reasons and/or even no reason at all. This can include deliberately misinforming a person a wrong time for their gain or the other parties loss in any given predicament or scenario
Though the man at the busstop clearly had a watch on, he clockblocked me when i asked for the time, leaving me unsure if i had missed my transfer.