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4.
Party Poison is the name of gerard way's (singer) character's laser gun that my chemical romance created. When their music video na na na from their most recent albim Danger Days: The True Lives of the Fabulous Killjoys came out, the names of the character's guns flashed on their faces so everyone started calling the killjoys by their guns names.
party poison helped fight the better living industries.

Party poison, jet star, kobra kid, and fun ghoul fought the S/C/A/R/E/C/R/O/W/ unit.
by gewn purple December 26, 2011
 
1.
A character played by Gerard way who has red hair, a yellow mask and yellow pew pew guy that shoots lasers.
he is an amazing person who is apart of the killjoys or heros of battery city. but he unfortunately died in the second video, sing. RIP
Girl1: OMG party poison die in sing!
Girl2:im never going to be able to look at anything red.
Girl1:me two
walking
Girl2:a red pencil case
Girl1:a red sigh
they both start crying
by Party Poison RIP December 06, 2010
 
2.
The leader of the Killjoys, a group of new superheroes started by My Chemical Romance based in California, 2019. Party Poison (Gerard Way), is known for his colourful hair and outfit and the fact that he leads the Killjoys.
Party Poison is very sexually attractive.
by Swift Spark August 14, 2011
 
3.
-Noun
1. The leader of the fabulous killjoys that has bright red hair and holds a yellow ray gun. He is seen in the music videos of My Chemical Romance in Na Na Na (Na Na Na Na Na Na) and Sing. May be refered to as either Party or Poison. He is played by Gerard Way, front man of My Chemical Romance. (Reference to Danger Days True Lives Of The Fabulous Killjoys)
Party Poison fought off those Dracoloids bravely, shooting each of them in the gut with his laser gun, and saved the day.
by Atomic_Ash_161 January 02, 2012