get something on someone

Also, have something on someone. Obtain or possess damaging knowledge about someone. For example, They hoped to get something on the candidate, or Once Tom had something on his boss, he knew he would not be pressured again. [c. 1920] Also see be on to.

Words nearby get something on someone

get someone's back up, get someone's goat, get someone's number, get something into one's head, get something off one's chest, get something on someone, get somewhere, get straight, get stuffed, get the advantage of, get the air