bitching
v. C1 Advanced US //ˈbɪtʃɪŋ// UK //bˈɪtʃɪŋ// bitch·ing
v. complaining about something in an annoying way. You use this when someone keeps talking about their problems or things they do not like.
v. expressing complaints or grievances in a persistent, petty, or ill-tempered manner. Often implies that the speaker finds the complaining tedious or unnecessary.
Stop bitching about the weather and just get your coat.
They spent the entire lunch break bitching about the new office rules instead of eating.
While the staff spent hours bitching about the management's decision, no one actually stepped forward to suggest a viable alternative during the official meeting.
Usage
The verb is intransitive and often takes the preposition 'about'.