verb

complain about something trivial; grumble.

she heard him grousing about his assistant

grumble,complain,moan,groan,protest,whine,bleat,carp,cavil,lodge a complaint,make a complaint,make a fuss,object to,speak out against,rail at,oppose,lament,bewail,grieve over,sorrow about,sorrow for,sigh over,mither,twine,bellyache,beef,bitch,grouch,kick up a fuss,kick up a stink,sound off,go on,whinge,gripe,grizzle,chunter,create,kvetch,chirp,crib,natter,plain over

noun

a complaint or grumble.

our biggest grouse was about the noise of construction work

grumble,complaint,moan,groan,whine,grievance,objection,protest,protestation,cavil,quibble,beef,gripe,bellyache,grouch,whinge,plaint