Top Definition
to insert ones thumb into the anal or vaginal orfice.
i said "thumbfuck", you dumbfuck!
To be constantly on your phone texting or messaging non-stop.
Classmate: "Has anyone talked to her about the break up?"
Me: "Na. She's been thumb fucking her phone all day and won't talk to anyone."
by MaddHatter June 27, 2016
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×