black-flagv.
/blakˈflaɡ/, U.S. /ˌblækˈflæɡ/ Originally and chiefly Motor Racing.
transitive. To signal (a vehicle or competitor) with a black flag as indication of a disqualification, penalty, etc. Also: to halt or terminate (a race) by signalling with a black flag. Cf. black flag n. 3.
ΚΠ
1952 Motor 23 Apr. 379/3 They stand out on the side of the track bearing a competitor's number in figures a foot high, black on yellow, when they want to black-flag anyone.
1962 Montana Standard 30 May 14/3 Ignoring the yellow..will result in the violator being black flagged and the loss of one lap.
1978 Pop. Mech. May 250/2 The race finally had to be black-flagged because wreckage on the track had littered practically all the lanes.
1986 Miami Herald (Nexis) 13 Apr. d7 We tried to batter along at 50 miles per hour in 12-foot seas before the race was black-flagged at Bimini.
1991 San Francisco Chron. (Nexis) 1 July c7 The entire class had made a premature start. All the boats were black-flagged off the course.
2006 P. Golenbock Miracle 122 Gazaway black-flagged an enraged Petty, who pounded on the steering wheel in anger. He lost a lap, and it cost him the victory.
Derivatives
black-ˈflagging n.
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1956 Los Angeles Times 16 Sept. iii. 23/1 The black-flagging of veteran drivers Ed Kretz and Rudy Cleye by CSCC officials during the recent Paramount Ranch speedazzle.
1971 Autocar 11 Feb. 29/3 The fact that the skirts..would touch or drag the track is a direct violation and would result in the black-flagging of any such car.
2010 Age (Melbourne) (Nexis) 15 Mar. (Sport section) 9 A major controversy was the late black-flagging of defending champion,..who was ordered into the pits after bodywork from his Commodore was dislodged.
This is a new entry (OED Third Edition, September 2011; most recently modified version published online December 2021).
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v.1952