Using your fingers to pleasure a females vaginal region. Basically fucking a girl with your fingers.
by Roz October 28, 2003

When you reach a cataclysmic orgasm and right as you cum the force of your orgasm blows the foreskin off of your dick and hits your partner in the face with your semen acting as an adhesive and then sends your partner flying as if you gave them a d-rock
Ratchell didn't believe me when I said I might mass blast her so when I nutted the foreskin on my dick shot off and made her go flying back.
by spine fetish64 January 11, 2019

It originates from the episode of South Park called The Jeffersons. In this episodes a new person moves into South Park who is supposed to be Michael Jackson in disguise. This new person is called Michael Jefferson. Mr. Jefferson likes to sing and makes these sounds: hee hee (said in a very high voice), jikjamona, jahmone, jikjabeejerka. So a Jefferson blast is when you make any of these sounds at random periods in time.
Person 1- Inside the core of the sun hydrogen-
Person 2- HEE HEE
Person 1- god dammit Elliot. Will u quit doing Jefferson blasts!
Person 2- HEE HEE
Person 1- god dammit Elliot. Will u quit doing Jefferson blasts!
by poopy butt January 16, 2016

by RyizzleTheSpaffinator October 28, 2013

by blondie1041 January 15, 2017

When a someone is about to cum (male or female), the recipient will begin tickling until ejaculation occurs. Can also be reversed in that the recipient is the ticklee and gets tickled prior to receiving the cumshot.
Kim and Brad were talking the other night about how they love giggle blasting each other. Some kinky shit!
by PunkyDrewster58 August 15, 2015

When in a three way and cumming on the girl (either boobs or face) the area in which cum might shoot is considered the blast zone. The other guy is to stand back and whack while until the other guy finishes so he doesn't get hit. When the man is finished the other person approaches and the just finished person backs up to respect the mans Blast Zone.
by Jamgasm675 October 23, 2008
