Why is it called "Hot"? Because the margin for error is white-hot. One wrong micro-movement, and you fly past the ball. One delayed reaction, and you own-goal from the halfway line. Players who play "Hot" are literally "on fire"—either they score a hat trick in 30 seconds, or they burn out and lose 5-0.
: In many HaxBall subcultures (particularly the Turkish or European communities), these macros are used as a form of "trash talk" or to signal that a player is playing exceptionally well (being "hot"). opmode haxball hot
In standard Haxball (the browser-based version), your movement is binary. You press a key; the host server registers an action. Due to latency (ping), actions are often delayed, leading to the famous "laggy" or "heavy" feeling. Why is it called "Hot"