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A Jefferson Blast is when you holler out the sounds HE-HE, HEE, Jikjamona!, Jahmone, or Jikjahbnah! This is derived from South Park's The Jeffersons in which they do a parody of Michael Jackson.
Bob- Have you been up my wishing tree...
john-wait for it...
john- that was a big jefferson blast
by poopy butt December 06, 2015
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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!
by poopy butt January 16, 2016
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