Answer: wipeout

AnswerCrossword Clue
WIPEOUTSurfer's tumble
WIPEOUTGo down when surf's up?
WIPEOUTSurfing mishap
WIPEOUTAnnihilate: Colloq.
WIPEOUTNasty fall
WIPEOUTFall, while surfing
wipeoutdestruction, annihilation, or murder
wipeoutfall from a surfboard
wipeout(in sports) a decisive defeat
wipeouta fall from a surfboard
wipeoutcomplete physical exhaustion
wipeouttotal or complete failure