To be extremely desperate; wanting to be in a relationship really bad.
Girl: My boyfriend broke up with me last week.
Guy 1: That sucks, want to go out with me?
Guy 2: He's missing out, you're perfect. Go out with me?
Guy 3: You're beautiful. Give me a chance to make you happy.
"Ron was so thirsty, he asked out that girl faster than anyone else did."