Urban Dictionary defines thirsty as "too eager to get something; desperate." This desperation could be in reference to anything 👀 — 👉🏽compliments,👈🏽

✋🏽validation,✋🏽

🚩🚩🚩attention ❗❗❗— but it is most frequently used to specifically mean desperate for sex.Ecclesiasticus 26:12

[12]She will open her mouth, as a thirsty traveller when he hath found a fountain, and drink of every water near her: by every hedge will she sit down, and open her quiver against every arrow.