haul off and do

haul off and do something

 
1. Inf. to draw back and do something, such as strike a person. She hauled off and slapped him hard. Max hauled off and poked Lefty in the nose.
2. Rur. to do something without a great deal of preparation. The old man hauled off and bought himself a house. Someday, I'm going to haul off and buy me a new car.
See also: and, haul, off