I've been seeing this a lot more recently (mostly in YouTube comments). What is its etymology? Is this a recent invention?
Example: YouTube video with 2M views: 17 Thirsty Athletes Caught Staring at Gorgeous Women (2015).
Example: YouTube comment at this video — "Damn that woman is thirsty. Ooooh, OOOOOH!"
This 2017 NYT article seems to suggest it's used in a broad range of circumstances, but my question pertains specifically to the "horny-desperate" sense, which I seem to be seeing a lot more these days (again, mostly in YouTube comments). (Yes, I know "thirst" has been used metaphorically in many senses, e.g. "thirst for knowledge" for maybe centuries, but I've never seen it used in the "horny-desperate" sense before the last few years.)
My guess is that it's a somewhat-newish US black urban slang, but I could be wrong, hence this question.
Best Answer
Green's Dictionary of Slang notes in their entry on this sense of "thirsty" the context US Campus, indicating that it is very recent slang used by U.S. college students and other young people. No actual date is attested.
Other write-ups on millennial slang, like this one in Metro, sometimes refer to the word as being primarily about wanting attention, not necessarily of a sexual nature.
According to Corina Chocano of The New York Times, writing in April 2017, the term originated in black culture and then shifted to Internet culture. The term is described in depth in an article in The New York Times from April 2017.
Chocano draws attention to the growth in popularity of the term at the time of a 2014 Diet Coke ad with the tagline, “Be ambitious, not thirsty. You’re on Diet Coke.”
It's worth noting that thirsty in the 1980's to present has also been slang for desperately craving drugs, according to Green's Dictionary of Slang. This could have been a precursor for the meaning related to craving attention of a sexual kind or otherwise, and is probably part of why the Diet Coke commercial drew a lot of attention.