Released on December 24, 2017, “pissed off.” is KILL.ZERO’s most popular single, behind “whimpers in the darkness,” a collaboration with Juice WRLD.

“pissed off.” depicts the aggressive end of a relationship between KILL.ZERO and his ex-girlfriend. KILL.ZERO describes his ex-girlfriend’s intentions in the lines “You just want the push-to-start”,,where he explains that she only wanted him for the money. Lines like “I won’t trust shorty, she just wanna seal it,” and “I can’t say that you wanna ride” also reveal the lack of trust that was in the relationship, and the lack of legitimacy and dedication on his ex-girlfriend’s part.

On June 15, 2020, “pissed off.” would finally be re-released onto all platforms.