CLOCK TRANSITIVE VERB

In slang, to take notice of (a person or thing), to spot; also, to watch, to stare at. Etymology: Probably derived from the practice of clock-watching, which involves repeated glancing at the clock. History and Usage: This word has been in use in underworld or criminal slang since about the forties, but has recently been taken up by journalists and moved into a rather more respectable register. This is the one rhythm machine that puts you back in the driving seat. Clock the SBX-80 at Roland dealers now. International Musician June 1985, p. 86 Our waiter...was so busy clocking him that he spilt a bottle of precious appleade over the tablecloth. Sunday Express Magazine 3 Aug. 1986, p. 33