"On the clock" refers to when one is getting paid by the hour and any setbacks are viewed in a positive light, because the longer the job takes the more you get paid.
Ryan: "dammit, we've hit every single red light on the way!"

Kevin: "don't worry about it chief, we're on the clock!"

Ryan: "nuff said."
by Dirty danchez June 29, 2009
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1) To regard an act or object.
2) The act of hitting a person.
3) A gauge, such as a speedometer.
4) To gauge, to estimate, to time.
1) You clockin' that hot AMG?
2) Try to steal my AMG, I'll clock you.
3) These new 340 km/h AMG clocks rule!
4) Cop clocked me at 340 in my AMG!
by T.D. January 20, 2003
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Observed, recorded, noted. Possibly related to determining the speed of a car by using a stopwatch to time its travel between two fixed points, such as "He was clocked doing 60 in a 45 zone".
"Hey that guy keeps eyeballing your iPod." "Yeah, I already clocked him."
by GayMedia April 5, 2010
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Beaten, bashed, punished. To hit someone.
"Shut the fuck up before I clock you."
"He waz gettin' tough, so I clocked him one."
by Diego September 11, 2003
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Scale for weighing drugs
"I don't think this is an O. You got a clock?"
by Lucca Brassi March 26, 2009
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Hitting someone with a closed fist.

Time telling device
I clocked Valencia, for making a rude comment.

That clock is 20 minutes fast.
by Saints February 16, 2005
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Literally means 'realised' or 'understood', virtually always said after just - just clocked on (just realised)
Person A: "Oh, he was joking."

Person B: "Yeah, I just clocked on."
by Spice Tropics May 6, 2013
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