1 [intransitive and transitive]
if part of your body or your clothes itch, you have an unpleasant feeling on your skin that makes you want to rub it with your nails [↪ scratch]:
My feet were itching terribly.
The label on this shirt itches me.
2, be itching for something informal
to want to do something very much and as soon as possible:
He was itching for a fight.