Top definition
A person who is just beggining to be sneaky,devious,lucky,slippery, etc. and will eventually be a "sly dog".
Gabe: That new kid is trying to steal Austin's wallet.
Channy: He is such a sly puppy.
by ▒☺♫ May 06, 2009
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2
a person who is cute and slutty or a puppy who is sly...
yo slypuppy! whats up?
by nikkiiiiiiiiiiiii12321 July 11, 2009
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