This word comes to me because I heard it talked about on a podcast I listened to yesterday called A Way With Words. If you are into words–a word nerd–like I am, I suggest you give it a listen.
The other factor that made carhawk relevant is that it has snowed here in Colorado every day for the past few days. Additionally, the temperature has been below zero when we wake up in the morning.
Carhawk is a play on words for the term Mohawk–as in Mohawk haircut. As you may know, this Native American-style haircut is basically a strip of hair down the middle of the head, with the rest shaved.
It refers to how your car looks after you wipe the snow from the windshield. On some cars, like my van, it is next to impossible to reach the center of the glass.
This strip of snow that remains is a carhawk.
I submit that it could also be called a snowhawk.