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an itchy trigger finger
1. An inclination or readiness to shoot a gun (especially at someone) without needing much or any provocation or justification. I wouldn't stay too long around here—there are a lot of people with itchy trigger fingers in this part of town.
2. By extension, an inclination, readiness, or tendency to act or react carelessly, rashly, or without due consideration. John's itchy trigger finger is going to get him into trouble with his boss someday. When you're working in a restaurant, it's important not to have an itchy trigger finger when customers come to you with complaints.
have itchy feet
To feel the urge to stray from one's routine, often by traveling. Primarily heard in UK, Australia. Every so often, Claire has itchy feet and sets off for a foreign destination.
Fig. the need to leave; a feeling of a need to travel. (*Typically: get ~; have ~; give someone ~.) Hearing the train whistle at night gives me itchy feet.
*itchy palmand *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.
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]
If you have itchy feet, you want to go somewhere new or start doing something new. I hated living in London, and I started getting itchy feet. Hearing about Sally's job had given me itchy feet and within a couple of months I left the company.
itchy fingersmainly BRITISH
If you have itchy fingers, you are very keen to get involved in a particular activity. I went into town to watch people playing chess. After a few days of this I started getting itchy fingers.
get (or have) itchy feetbe restless; have a strong urge to travel or move from place to place. informal
get/have itchy ˈfeet(informal) a desire to travel, move house, change your job, etc: He never stays in a job long. He gets itchy feet after two or three years.
an itchy palm
A strong desire for money, especially bribes.