I remember when I fell off my dinosaur

A term originating in Montgomery and Bucks County. It's largely seen as a derogatory word towards women. It's used to call a specific women a useless slut.

Jill: Hey Billy I am so sick of you, you are such an asshole.

Billy: Wow Jill all I know is I remember when I fell off my dinosaur and I am glad we are through.
Jill: You are such an asshole.