A male that unsuccessfully attempts to hit on alot of girls for the sole purpose of having sex with them, but most of the time they are rejected and labeled as "thirstyniggas"
-"this guy is always trying to hit on me!"
-"what a thirsty nigga"
A nerdy, likely virgin male, often found in a Twitch chatroom, giving compliments and donating large sums of money to attractive female streamers (or in some case male streamers) in hopes that the streamer will acknowledge them out of excitement, since this is the only sort of remotely sexual or evenfriendly interaction they are capable of receiving in their unfortunate lives.
Alpha Male 1: "Did you see some thirstyboy donated $5000 to Kaceytron?"
Alpha Male 2: "Yeah she makes a pretty good living off those thirstyboys' donations."