Because Infantwear is Cool?

I just moved to a new city a few weeks ago and I was talking to this girl my age. She was wearing a romper, nothing particularly special about it - just solid black. But this isn't the point. The point is, this damn girl thought they were called onesies. This is our conversation:

leah: oh i just got this onesie the other day.

me: ......

leah: yeah, like its so cute but i can't do anything in it.

me: *thinking what the actual fuck*

leah: the top and bottom are attached.

THE TOP AND BOTTOM ARE ATTACHED.
ohhhhhhhhhhhhh lord. Then she tried telling me a Range Rover wasn't a cool car. Bitch leave.