jumpout

From jump +‎ out.

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jumpout (plural jumpouts)

1. A separation from a groove, track, etc., that otherwise constrains motion.
   • 1995, John E. Costa, Natural and Anthropogenic Influences in Fluvial Geomorphology: The Wolman volume, page 210,

     Encroachment into potential flood avenues resulted in jumpouts, flooding, and extensive siltation.

2. (Australia, horse racing) An unofficial trial race.
   • 2009 January 31, Matt Stewart, “Bart Cummings ready to derail Lightning match race”, in Herald Sun‎:

     The few who attended Tuesday's important Lightning Stakes jumpouts at Flemington on Tuesday may have been put off by Swick's lethargic display.

   • 2011, David Brasch, Peter Cook, Jockeying To The Top, unnumbered page,

     I did get to ride in a couple of barrier jumpouts, but even that was sprung on me. I was riding a horse towards the track when Murty said it was going for a jumpout, a sprint about 400 metres from the barriers down the home straight.

3. (US, slang) A plainclothes narcotics officer.
   • 1997, Leon Dash, Rosa Lee: A Mother and Her Family in Urban America, page 33,

     “Well, I figured if the jumpouts came they wouldn′t search her,” says Rosa Lee. “They′d search me but they wouldn′t find nothing.”

• jump out

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