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noun

very simply methamphetamines,

anyone who does twak is an idiot, but its survival of the fittest, so keep on tweeking
that dude is on twak, what an idiot
by Mamao May 14, 2007
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It's a common word in almost all African langauges (Afrikaans, Xhosa, Tswana, Sotho, Zulu etc.) throughout Southern Africa (South Africa, Namibia, Botswana, Zambia, Zimbabawe, Mozambique, Lesotho & Swaziland) for anything that you can smoke (Marijuana, tabbacco etc.).
Afrikaans: Jy! Gooi my vinnig 'n light. Ekke wil 'n bietjie TWAK rook.

Translated in English: Can you lend me a lighter, I want to smoke some tabbacco.
by Jeroen Oosthuizen January 05, 2006
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A word made up by a group of crazy hippie friends from the Inland Empire in southern California in 1999. Used to describer a person who was being stupid and/or annoying.
Don't be such a twak!!!
by Michael D. Palmer December 01, 2006
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TWAK is a word from the Afrikaan dictionary and it means 'TOBACCO'.
As in - "verkry enige plig vry twak, maat"?

Meaning - "got any duty free tobacco, mate"?
by topscuttler August 12, 2009
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To back some ones penis.
You say that again and I'll twak you!
by B_man March 19, 2003
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