Taking ones phallus, or male genitallia and continuing to rub and or stroke, with ones hand or manus in latin, until reaching the point of orgasm or ejaculation which is when the liquid known as Spermatozoa explodes from the head of the said urethra
This is a derogitory term others such as beating the meat are often prevalent

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.