Julian is correct. You should also know that when “dick” is used to mean a jerk, it is almost always used in reference to a man. It is unusual, but kinda refreshing, to hear it used in an “equal opportunity” way to refer to a woman who is a jerk.

haha! This is quite vulgar. In this case, “dick” is a slang term for “jerk” or an unkind person. It is also a slang term for a penis.

She can be really nasty/unkind sometimes. "Dick" here means "unkind"/ "cruel"; but literally it means "penis" in American English or "any long protruding object" in British English.

This question made my night so much better 😂 ㅋㅋㅋㅋ