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2.
a fork having three tines instead of the more typical four (which is a "fourk")
the dining hall has threeks instead of forks, now.
by ewige December 30, 2011
 
1.
a three-tined eating utensil, similar to a fork.
Look Mommy, this lady uses threeks instead of forks.
by sportster_16301 December 30, 2003