carp at (one)
To complain to one about someone or something, especially in a way that one finds annoying. If you hate your job so much, quit carping at me about it and look for a new one!
carp at someone or something
to criticize someone or something. Poor Clara is carping at Bill's carelessness again. Please stop carping at me.
carp at someone (about someone or something)
to complain to someone about someone or something. Why are you always carping at me about your family? You are always carping at Joan about her brother.