Commonly said when one feels the need to drink something. However, 'I'm thirsty', when said to one's significant other, is the code word for 'let's go fuck on a camel!'

Appealing females out on the town and up for a one night stand

When a girl is so obsessed with what another girls does and she won't leave her alone. What the other girl does doesn't even concern her, and it's not even a big deal but the thirsty girl just won't leave her alone.

Desperately wanting affirmation.

1.
feeling a need to drink.
"the Guides were hot and thirsty"
synonyms: longing for a drink, in need of a drink, dry, dehydrated; More
(of land or plants) in need of water; dry or parched.
"the earth was dry and thirsty"
synonyms: dry, arid, dried up/out, as dry as a bone, parched, baked, desiccated, waterless, moistureless; raredroughty
"the thirsty soil"
(of an engine, plant, or crop) consuming a lot of fuel or water.
"a huge thirsty 5.3-litre engine"
informal
(of activity, weather, or a time) causing thirst.
"modelling is thirsty work"
2.
having or showing a strong desire for something.
"Joe was as thirsty for scandal as anyone else"
synonyms: eager, hungry, greedy, thirsting, consumed with desire, avid, craving, longing, yearning, lusting, burning, desirous, hankering, itching; informaldying
"his wife was thirsty for power"

Craving the "D" or "V" asf

Being desperate for attention especially from the opposite sex. The thirsty person is sexually aroused or in other words, horny.