One who has the ability to think for themselves and uses it.
If you had to read the example, you are not a thunker!

by Robert L Wooten September 27, 2006
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To make a large mistake like to shoot a 8 on a par 4 golf hole, or to totally screw something up, like ruin a term paper for school
Man, thats the worst thunker i have ever shot in one round of golf
by Johannathon June 18, 2005
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Just the FATTEST booty you've even laid your eyes on
Damn bruh you seen her over there she got a thunker on her
by Gumbyboi May 17, 2019
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The brain housing group, thought box, head, bucket, cabeza
In Iowa, you have to use your thunker to make it through the winters.
by jdillpickle April 18, 2019
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