bad form
Questionable or offbeat behavior that may warrant shame and/or an apology.
Guy 1: Hey, sorry for hitting on your sister like that, man. I guess I could've at least waited until you and your parents left the room...
Guy 2: Yeah. Bad form, dude. Bad form.
Guy 2: Yeah. Bad form, dude. Bad form.
Bad form
Bad form denotes treating another person in a certain way but getting all twisted, hurt and ego-busted when you receive the same treatment back.
I know it's Bad form to break up via text, but he only called me a handful of times during our relationship. I had to communicate in his language.