40 Highway
U.S. Highway 40.
For some reason Missourians (Who mostly also pronounce Missouri wrong) say 40 Highway for Highway 40. They also do this for the other numbered state and U.S. highways, e.g., 71 Highway, 50 Highway, 7 Highway, etc. I have no idea why they do this, and I have come across no other group who does this.
highway 40
screwed up, like the highway is. H40 for short. Usually used when talking about a person to stay away from.
John: That girl is like so H40!
Lizzy: Stay away from him, he's kinda highway 40.
Lizzy: Stay away from him, he's kinda highway 40.