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Somebody who is deceptive, ignorant or otherwise unpleasantly cunning. Not a friendly, jovial term, a Sackhead is very much similar to a dickhead, in which said person is claimed to have a penis, or in this case a (Nut)'Sack' upon their head.
'Matt is a Sackhead'

'Only a Sackhead would do that'
by Mightybear April 11, 2006
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Aug 3 Word of the Day
Condition which causes you to place an Amazon order, then shortly after remember something else you needed and place another order.
Wow, 10 Amazon boxes showed up on my door today. My Amazheimer's must be acting up again.

Person 1: Bro, your Amazheimer's is getting out of control.
Person 2: It's OK, I have Prime.
by SamboMayhem August 01, 2020
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2
a person who is acting stupid, trying to be funny, or a wanna-be
Bob, was being such a sackhead, that everyone left the party
by ashanakwa December 29, 2009
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3
Hair tied into a bun that resembles a ball sack. A potential sackhead begins as a perky, well proportioned bun. Through continued exposure to life, that once perky bun becomes a sagging shell of what it used to be.

If a friend is sporting a sackhead, it is your duty to promptly alert them of the saggage upon their head so they can fix it immediately.
"I can't believe Kristin actually went to the store with a sackhead, she really needs to fix that hair!"

"After working out, Katie's once perfect bun has become a sackhead."
by Ethel_8000 February 28, 2018
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4
Someone with no hair on their Head. (A bald person)

They are called a 'sack' head because their head looks like a hairless scrotum.
Timmy's got no hair left, he's become a sackhead.
by MilkDudlington August 23, 2016
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