The extremely large protruberence which preceeds an "Evil Fat Man" upon entering a room, attempting a menage a trois, or just generally walking around.

See also, Beer Gut, Dunlop Disease, or Spare Tire.

When you extend your elbow so that it resembles the upper fin of a dolphin, or shark and jam it into your victims back, or scrotum. Mostly done by bullys and neighborhood thugs.

A person who lacks the common sense to participate in any civilized conversation whatsoever but their failure to do so is tremendously hilarious. This is the person that is involved in your group for the sole purpose to get made fun of on a regular basis.

Horniest person in your group

Completely brain dead individual

Sassy to the point of hilarity

To be honest this person is just so stupid that he/she thinks that dorsal fin could possibly be an insult. I mean seriously, dolphins are one of the smartest animals that we know of today. How could anything remotely involving a dolphin be an insult?

The act of putting multiple strap ons on your back, lying down, and having multiple people ride said strap ons, whilst vigorously doing the worm.

when a person is born with both male and female reproductive parts, but the male part slightly sticks out of the female part

The fin on the back (dorsal) side of an aquatic animal such as a fish, dolphin, or shark.