(pronoun): 1 A reference to some person, place or thing;
(noun): 2 A platypus' genitals; 3 A reference to someone else's genitalia(specifically, a woman's breasts); 4 The male sex organ; 5 A birthday greeting.
plural: platypi genitalia
2 That looks like platypus genitalia!
3 That's a nice set of platypi genitalia you have there, *wink* *wink*.
4 That chick smoked my platypus' genitalia last night.
5 Happy platypus genitalia!