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As used in the dialect of Brazilian tribes such as the tupinamba and also derived from the Greek word: καταπολέμηση

1. To oppose in battle; fight against.
2. To oppose vigorously; struggle against
Both men shook hands after their fight, honoring the spirit of their koco.
by wrenta July 25, 2008
a man who takes anabolicfuel to grow larger mussles,

also it has been said that the name koco originates from an ancient tribe in south east africa, where a male who humpes a tree is considered a person who can communicate whith earth or "mother earth". Some members of this tribe can still be found in southwest of sweden and the east coast of northe america.
man you are really humping that tree like a koco
by whambam March 15, 2008