The perfected ancient art of doing something really homosexual or odd, or something along the lines of jizzing in a public place. The art reaches its peak, in the part where after doing said act, you yell a random, confusing phrase at your company, and make a daring escape. The facts prove that moses led the israelites out of egypt by pulling a horny manfish. History's great escapes have all been, in reality, real examples of horny manfishes.
Another name for a homosexual man. Sometimes referred to as a rainbow fish. There are many fish in the sea metaphorically, but mudfish tend to seek out mates of the same sex. They get this title because of the mud-like fecal matter that coats their genitalia after sexual intercourse.