- noting or pertaining to errors made by hitting the wrong key or button on a keyboard, keypad, or number pad: fat-finger dialing errors;a large number of typos evidencing the fat-finger syndrome.
- to make an error in or on (something) by hitting the wrong key or button: I must have fat-fingered my username.You can easily fat-finger the tiny keyboard on this device.
- to make a mistake by pressing the wrong key on a keyboard or number pad
- to make an error that causes further problems
