put-on n. Slang
A deceptive outward appearance.
The act of teasing or misleading someone, especially for amusement.
Something, such as a prank, intended as a hoax or joke; a spoof.
As in, DJ Mesa told us she was going to play more blues on this show, but she was just putting us on.
Briefly, related sayings might include:
Are you having me on? (To kid or mislead someone )
Are you taking the mickey out of me? (Teasing or making fun of someone)
He’s pulled a fast one. (To trick or mislead someone)
One great thing about music and songwriting is how it allows for colloquialism and slang to be developed into a great song. Don’t put me on, just don’t do it.