Answer: keepitup

AnswerCrossword Clue
KEEPITUPWords of encouragement
KEEPITUPEncouraging words
KEEPITUP"Go, man, go!"
KEEPITUP"Don't stop now!"
KEEPITUPCompliment for an airline?
KEEPITUPParent's words of warning
KEEPITUPParent's words of warning or encouragement
KEEPITUP"Don't quit now!"