"Thumb typing" refers to the act of typing on a smartphone or other handheld device using only your thumbs.
Sentences with «thumb typing»
It is too wide for thumb typing yet awkward enough for regular typing. (goodereader.com)
For a big guy like me, thumb typing on a Plus model is pure joy. (iphonehacks.com)
So, the rule of thumb type planning, the person with the higher benefit should push theirs out, just to protect the surviving spouse. (purefinancial.com)