After fumbling with the cell phone for several minutes, my daughter took it away from me, quickly sent the message and told me, "Dad, you have no texterity!"
"Grandma is a very slow texter." or "My girlfriend never returns my texts. She is a very flakytexter." or "She prefers texting so she never calls me. She's definitely a texter."
By Ester
Texterous
A person that is particularly DEXTEROUS at sending TEXT messages, preferably using only one, or at most two, thumbs. These people can send out messages at seemingly unbelievable speeds, amazing those around them with their deftness.
Chad was texterously churning out the messages - his thumbs were just a blur over his phone.