ブツブツ文句を言うの英語

to mutter―murmur―grumble―（飯などなら）―simmer

complain

to cause someone to grumble in complaint

to complain about something

have a moan

（人に向かってなら）to abuse one―revile one―rail at or against one―call one names―call one by hard names―make insulting remarks―（蔭でなら）―speak ill of one （behind one's back）―backbite one―stab one in the back―talk against one―whisper against one―calumniate one―slander one―make malicious remarks―throw dirt at one―pick one to pieces―pull one to pieces―talk scandal―make free with one's fame―take liberties with one's reputation

to say a rude thing―make an insulting remark

to scorn a person

make a joke

to speak bluntly―speak one's mind

to be pedantic―unaccommodating―uncompromising

to put one's foot in it

to make bad puns

to cause a person to mutter to himself/herself

to make an excuse

to exaggerate the truth―stretch the truth―magnify the truth―pile it up―make a mountain of a mole-hill

to give one fits

to make disagreeable remarks

He mutters to himself.

to cry over (something)

speak in superlatives

the act of saying bad things about someone

to insinuate―innuendo―drop a hint―（that he is a miser, etc.）

to say something badly

tell an untruth

I will be plain with you―speak plainly―speak in plain terms―speak in plain English―call a spade a spade.

to use a blunt manner of speaking

talk in one's sleep

to complain （of something）―fret

to make cynical remarks―sneer