Answer: grumps

AnswerCrossword Clue
GRUMPSKvetchers
GRUMPSCrabs
GRUMPSSourpusses
GRUMPSCrotchety folk
GRUMPSBellyachers
grumpsto complain or sulk
grumpsdepressed or sulky mood
grumpsGRUMP, to complain (to express discontent)
grumpsperson given to constant complaining