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1.
A complex acronym sometimes utilized by restaurant workers, often directed at kitchen staff members who have wandered astray of their work post. A cry of "KTFITK," or "Keep The Fuck In The Kitchen," is usually enough motivation to force the worker back into the kitchen area.

Note: If directed at a Mexican who should be in the kitchen, the effect is amplified numerous times over if used in conjunction with a Spanish curse, such as 'pendejo,' 'maricon,' or 'puta.'
Hey you, Raul! Pendejo! What are you doing out here?! KTFITK!!
by ApocKnight August 22, 2006