I expect it is from Alice in Wonderland: I'm late, I'm late.
PhD squared - the person has 2 PhD's (as if one weren't enough)
your plate hereAnother: your pleasure (?)
Which one? I guess it would depend on the license plate, but the colors of a license plate usually symbolize something of value to the state
brb
You Amaze Me!!
always mine
Public transportation
Possibly "antique lover"
Registered architect
Tools of Ignorance
Permanently disabled
Registered Physician Assistant