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To accumulate, or to record the total or accumulated amount of something. A noun or pronoun can be used between "clock" and "up." Considering how many miles I've clocked up on my car, I think it's time to get a new one. Their star player has clocked up an impressive number of points this early in the season. Clock another win up for the home team.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
clock something up
1. to record the accumulated hours, miles, etc., of some device or machine. (The recording is usually done by a meter of some type such as a speedometer, an elapsed time meter, etc. She must have clocked two hundred flying hours up in six months. She clocked up a lot of hours.
2. to reach a goal that is worthy of being recorded. (*Typically sports journalism. Compare this with chalk something up.) Patrick clocked a fantastic number of points up this year. He sure clocked up a lot of goals.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
Record accumulated hours, miles, or points. For example, It won't be easy to clock up 1,000 flying hours, or Brian clocked up a record number of baskets this year. [Mid-1900s]
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.