-noun
the aquatic larva or immature form of frogs and toads, esp. after the development of the internal gills and before the appearance of the forelimbs and the resorption of the tail.

A young man that goes out with an older woman.
It's sad how Anna and her tadpole get all these stares from the close-minded, just because of their differences in age.

A derrogatory term for a Belgian. (Almost French, but not quite)

A close friend that one has known for an extended period. Someone that is held dear to the heart. A person who knows a great deal about another.
Hey, Tadpole, what's up?