Spanish for "hand-to-hand". Used most commonly for a competition between two people - often in hand to hand combat.

The phrase is often mistakenly thought by English speaking people to mean "man-to-man".

Anatidaephobia is defined as a pervasive, irrational fear that one is being watched by a duck. The anatidaephobic individual fears that no matter where they are or what they are doing, a duck watches.

Anatidaephobia is derived from the Greek word "anatidae", meaning ducks, geese or swans and "phobos" meaning fear.

man to man, one on one, usually used in the context of a physical confrontation / altercation between two gentlemen.