Platypus

By popular demand...

Definition: (from dictionary.com)
-noun
1. a small, aquatic, egg-laying monotreme, Ornithorhynchus anatinus, of Australia and Tasmania, having webbed feet, a tail like that of a beaver, a sensitive bill resembling that of a duck, and, in adult males, venom-injecting spurs on the ankles of the hind limbs, used primarily for fighting with other males during the breeding season

Examples:
"Peter picked a pretty purple platypus."
"The male platypus has venomous ankle spurs."

Origin: (from etymonline.com)
"Australian duck-mole, 1799, from Modern Latin, from Greek platypous, literally 'flat-footed,' from platys 'broad, flat' (see plaice (n.)) + pous 'foot' (see foot)."

Awkwardness rating: 5

A platypus! (edward-t-babinski.blogspot.com)