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where the thighs go straight to the back, no ass at all
She was fine from the front, but when she walked by, I noticed that she had thack.
by Renae B June 01, 2006
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Nov 27 Word of the Day
A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.
That fucking smooth brain put his shirt on backwards again...

That smooth brain is dumber than a pile of shit.
by Tip Tank May 14, 2011
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Where a girl has a horrbile thick knotted pubes..
β€œI woke up feeling a clear case of thack attack as I rub my tongue along my teeth”
by JahJahRastafari June 18, 2009
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Thack (th-ack)


A strong hit or slap referred to when the object of the sentence is ass.
1.) Yo! I just thaked your homies ass!

2.) Watch your ass or your gonna get a hard thack.
by Obama Bin Stalin March 10, 2019
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adj. 1 Term to describe a girl who is beyond thick, well into the fat range.
1a But has so damn many endearing qualities that you would never say this word to her. (conditional)
2 An insult to a female who is fat and annoying, but mostly tries to come off as sexier than she is.
3 As used in court when your ass is soundly beat by said girl, in a descriptive way, as to relate to the events of your mauling, not court opinion. Which may be the same as 2.
1 <i>(while watching t.v.)</i> "hey she is kinda cute, kinda thick." <i>(reply)</i> "Nah, she aint thick, she's thack"
by Anon Mk 2000 April 14, 2009
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to be tweakin out on amphetimines or any other upper
that ice got the whole town thacked out
by yo you November 01, 2006
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v. to curl the middle finger under the thumb and release the finger with great force onto an unsuspecting target. Works well on victim's head or ear
"I thacked that foolio"
by D-money November 01, 2004
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