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.
by banditoslover05 July 05, 2011
Get the Thumb Blastmug. When your fucking your girl in missionary and she opens her mouth to moan and you jam your thumb down her throat until she vomits.
by Judgementday16 November 29, 2017
Get the thumb blastedmug.