Top Definition
The act of using one's thumb or thumbs to infiltrate one's anal or vaginal opening using extreme force and excessive repetitions. Similar to finger blast.
Yo bro, I thumb blasted the shit out of that girl from the bar last night.
by banditoslover05 July 03, 2011
Free Daily Email

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

Emails are sent from We'll never spam you.