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Twaves is the bit on a fag or doob between twos (Half of it)

and saves (The last Quarter on it)

So Three Quaters is Twaves.
A Real Jamaican Wagwaan: Safe Safe Rudeboi Some on that doobie aye?

A Ral Fat Yank: Nah blood my last bit of draw ill save you twaves on it.
by Mitch Wagwaan March 08, 2009