To suddenly use a mask of superficial
personality or emotion to cover your real one, around everyone or a certain
people to make them either:
1. like you
2.
dislike you
3. feel sorry for you, or
4. be downright confused.
Also can be referred to as two faced.
1. Jared is such a
put-on when he brings me around his
guys!
2. When she started crying and feeling sorry for herself, I could tell it was a
put-on.