thumbfuck
to insert ones thumb into the anal or vaginal orfice.
i said "thumbfuck", you dumbfuck!
thumbfucked
To get a thumbs down vote on urban dictionary.
Someone just thumbfucked me on urban dictionary.
Thumbfucker
A thumbfucker is a person who is constantly texting on their cell phone.
David called Phillip a thumbfucker as he drove by watching Phillip text on his phone.
thumbfucking my phone
The hateful practice of text messaging.
I mean, I like the girl, but she's always got me thumbfucking my phone.