Sweatbag
A person who's really a try hard at video games, to the point that they start sweating because of how hard they're trying.
AJsoko really went sweatbag mode that last game, he had 18 kills.
Hollow Sweatbag
A derogatory phrase for someone who makes ridiculous claims as facts and then once challenged regarding the veracity of such facts, refuses to provide any evidence for their claims.
Hey bill, where is your answer? You are a hollow sweatbag, and not a mathematician.