2) <adj> Causing thirst.
3) <adj> Expressing a desire to want something.
4) <adj> Chiefly British slang; A exceptionally attractive female (or man, respectively) who is "thirsty for sperm."
--> From Old English: 'Thurst'
That Phidippides must have been thirsty after running 140 miles from Marathon to Sparta in 2 days.
Running 140 miles in two days is thirsty work.
I am thirsty to win that tournament!
SCOTT: "I've just seen a girl; She was thirsty."
FLETCH: "How do you know?"
SCOTT: "I mean she was thirsty for sperm!"
FLETCH: "Show me the girl."
Girl: Ohhh I see. I'm pretty thirsty too. Notice any camels near by?
a) Someone who is parched and would like to cure it by drinking liquids
b) Someone who is greedy or wants something badly
c) Someone who wants to have sex or is sexually aroused
b) *iggas are thirsty out here. They do anything for the dollar
c) F1: See that hot bitch over there?
F2: Yeah, she's making me thirsty