A textonym is a word which becomes ambiguous when using predictive text due to having the same button combination as other unrelated words. They often make a text confusing or incomprehensible.
Particularly prominent in drunk texting.
to text someone without them knowing who you are, to text someone with your true identity unknown
unknown: hey
anthony: uh hi...
unknown: whats up
anthony: nothing you?
unknown: same just chillen
anthony: will you tell me who are you now? please.
unknown: textonymous