conk

:  to hit especially on the head :  knock out

:  the visible fruiting body of a bracket fungus; also :  decay caused by such a fungus

1 :  break down; especially :  stall —usually used with out the motor suddenly conked out

2a :  faintb :  to go to sleep —usually used with off or out conked out for a while after lunchc :  die I caught pneumonia. I almost conked — Truman Capote

:  to straighten out (hair) usually by the use of chemicals

:  a hairstyle in which the hair is straightened out and flattened down or lightly waved —called also process