Answer: bobup

AnswerCrossword Clue
BOBUPArise unexpectedly
BOBUPEmerge suddenly
BOBUPCome quickly to the surface
BOBUPCome to the surface
BOBUPPop to the surface
BOBUPAppear suddenly
BOBUPAppear suddenly.
BOBUPBounce to the surface
BOBUPAppear unexpectedly