It is a brazilian portuguese slang meaning the same as dick, cock, prick.

É um termo de gíria do português brasileiro, com o significado de pau, cacete, pica, caralho.
At 17 y.o.,he was already 1,80 m high, but his dick was still quite small..

Aos 17 anos, já tinha 1,80 m de altura, mas sua pimboca era ainda bem pequena.
by Willhelmina Plowes December 24, 2009
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