Wiktionary
two-fingered typing
n. A method of using the keyboard of a computer or typewriter in which the typist uses only two fingers (usually the index fingers) to operate the keys, used especially by a person unfamiliar with the layout of the keyboard.
Usage examples of "two-fingered typing".
The only sounds in the room beyond his own two-fingered typing were the usual ambient noise of the computers and a raspy breathing from Chan.