to put a bandanna over one's face in such a fashion that covers the entire bottom of his/her face. This is done before unlawful actions such as drive-bys and robberies to disguise one self.
put on: The street thug "put's on" before a gang war
To be put on is to have your friends/peoplevouch for you to someone you'd like to date.
P1: "Hey, can you put me on with her?"
P2: "Sure, I'll tell her about all the money you got."
P3: "Don't forget to tell her how hot they'd be together, we'll help you get put on."