an itchy palm

an itchy palm

What one is said to have when they need or want a tip or bribe. A: "I can't believe that guy at the desk actually answered all of your questions!" B: "Ah, he just had an itchy palm—a little money made him more inclined to talk."
See also: itchy, palm
Farlex Dictionary of Idioms.

*itchy palm

 and *itching palm
Fig. [of a hand] in need of a tip. (As if placing money in the palm would stop the itching. *Typically: get ~; have ~; give someone ~.) All the waiters at that restaurant have itchy palms. The cabdriver was troubled by an itching palm. Since he refused to carry my bags, I gave him nothing. Whenever he sees expensive luggage, the hotel doorman gets an itching palm.
See also: itchy, palm
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

itchy palm

Also, itching palm. A desire for money, greed; also, wanting a bribe. For example, The porter has an itchy palm; he wants a big tip, or The mayor was known for his itchy palm. This expression alludes to placing money in the palm of the hand. [Late 1500s]
See also: itchy, palm
The American Heritage® Dictionary of Idioms by Christine Ammer.

an itchy palm

A strong desire for money, especially bribes.
See also: itchy, palm
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • an itching palm
  • itchy
  • itchy palm
  • tip (one) the wink
  • tip somebody the wink
  • tip someone the wink
  • pay (one) off
  • pay off
  • tip
  • on the tip of tongue