ab crack

ab crack (plural ab cracks)

1. (colloquial) The vertical ridge visible between a person's abdominal muscles, when highly toned.
   • 2016 July 20, Sian Ranscombe, The Telegraph:

     And now it's the turn of the horribly painful sounding 'ab crack' which has got people talking. That line going down the middle of the abdominals of most self-respecting bikini models? That’s what it is.

   • 2016 November 1, Jess Cartner-Morley, The Guardian:

     Any self-respecting It girl of the moment knows that the photo the paparazzi want is the one in gym leggings and a crop top, exposing this year’s must-have ab-crack.

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