(plural fat fingers)
- A supposed cause of typographical errors.
From the implication that a finger that is too fat (“big") is likely to strike a key in addition to or other than the intended one.
(third-person singular simple present fat-fingers, present participle fat-fingering, simple past and past participle fat-fingered)
fat finger - Computer Definition
Accidentally pressing the wrong key on a keyboard and entering an erroneous command that causes a serious problem. The term harks back to the very early days when computers were instructed to perform operations by flipping switches on the console.