groan about (someone or something)
To complain or gripe about someone or something. I turned the thermostat up, so you all can stop groaning about how cold it is in here, thanks. Michael, as long as you have long hair, Grandma is going to groan about it—you better get used to it.
groan about someone or something
to complain about someone or something. What are you groaning about? She is groaning about her work.