Definitions by RAQ

Yan-Yan 

n. the appearance of the same word consecutively in a sentence; the use of the same word back-to-back in a sentence

origin: my buddy's wife first and last name are identical and back to back, so it made sense to name this phrase after her

The gardner PLANTS PLANTS for a living.

The use of "plants plants" is a yan-yan.

Yan-Yan by RAQ August 18, 2006