zonk out

1 definition found

zonk out - WordNet (r) 2.1 (2005) :

  zonk out
      v 1: lose consciousness due to a sudden trauma, for example
           [syn: zonk out, pass out, black out]
      2: fall asleep fast, as when one is extremely tired; "after the
         long drive, we zonked out and slept for 10 hours"