fat-finger

adjective

1. 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.

verb (used with object)

2. 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.

verb (intr) informal

1. to make a mistake by pressing the wrong key on a keyboard or number pad
2. to make an error that causes further problems