Loser.

I'm having an argument with 4yo about something at the shops. This is normal. The argument continues all the way out to the car. This is normal. I tell her that if she does not cooperate and sit in her car seat straight away I will lose my temper. Also normal. I give her reports about my escalating temper so that when I really do lose it she's had plenty of warning. Normal, normal, normal.

"I'm going to lose my temper if you don't stop asking about this."
"I can't get you want straight away so if you keep shouting at me I will lose my temper do you want that?"
"You're really on thin ice now mate, you will regret it if I lose my temper."

4yo sighs, shoves her bottom into the seat, complies with the seat belt procedure and as I'm clipping her in mutters, "Loser."

She might as well have made the 'L' shape with her thumb and forefinger her tone was so derogatory. This is so funny coming from an angry four year old that I nearly fell backwards out of the car laughing. But because she'd been so rude that wasn't aloud and I had to buckle myself up and wait until my voice was steady before I could give her the lecture. The one where this isn't a nice thing to say to someone and what do if someone says that to her... bla... bla... I'm pretty sure she listened to the first few words of it.

To her credit, she got into the car without a fuss in the end. After all, this loser Mummy is quite scary when her temper is the thing she loses!