when a person is born with both male and female reproductive parts, but the male part slightly sticks out of the female part
hey that chick has a dorsal fin!!!
ewh nasty!!!
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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.
"Damn, did you see the Dorsal Fin on that Evil Fat Man?!?"
by T&E August 16, 2005
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the technical and erudite term for vaginal penetration from behind, the "doggie-style" position.
After completing 2 rounds utilizing the standard and ever-so-boring missionary position, I had her mounted on all fours, as she assumed the ventro-dorsal position.
by weave August 23, 2003
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An oversized fin shaped , flap of skin , (landing strip), connecting male or female anus to penis or vagina.
My dorsal choad is chafed and inflamed, Dr. Paul, please script me meds to shrink.
by Rivardary June 16, 2019
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a parasite shaped like a fetus that attatches itself to the back of the victim and uses a fleshy tube to syphon nutrients to itself
woah did you see debby?
yea she has a monstrous dorsal fetus!
by SwabbyLeftNut April 2, 2011
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