hold out on

hold out on (someone or something)

To keep something from someone or something else, especially information or money. Are you holding out on me? Do you know more details about the merger than you're letting on? Someone needs to chip in three more bucks and I'll have enough to cover the bill. Who's holding out on me?
See also: hold, on, out
Farlex Dictionary of Idioms.

hold (something) out on (someone or something)

to keep news or something of value from someone or a group. What's going on? Are you holding something out on me? Don't hold out on the city council. They have ways of finding out everything.
See also: hold, on, out
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

hold out on (someone)

To withhold something from: Don't hold out on me; start telling the truth.
See also: hold, on, out
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • a straw will show which way the wind blows
  • (someone or something) promises well
  • a fast talker
  • a/the feel of (something)
  • (I) wouldn't (do something) if I were you
  • (have) got something going (with someone)
  • a horse of another
  • a horse of another color
  • a horse of another colour
  • accompanied by