1 definition by my bff rose

Simpy is used as short word when describing a person who is a simpleton. Someone who's mind is so simple, they cannot always grasp concepts. Like a monkey. They also are known as numskulls, blockheads, ninnys, and dopes. A good example of a simpleton would be Jessica Simpson, also known as Jessica Simpleton. You can also use simpy when some one is acting a fool or foolish.
Use simpy as such:

"Melissa, your so simpy!"

or

"Melissa, your such a simpleton!"

or

"Melissa, your such a simp!"
by my bff rose March 5, 2010
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