fat-finger

[ fat-fing-ger ]
/ ˈfætˌfɪŋ gər /
Informal.

adjective

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)

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.

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Origin of fat-finger

First recorded in 2000–05; so called from using the thumb to type, or accidentally hitting two keys with one finger
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for fat-finger

fat-finger

verb (intr) informal

to make a mistake by pressing the wrong key on a keyboard or number pad
to make an error that causes further problems
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012