A person who kills every thread they post in, normally in two posts, the first makes the mood go OMFG, then the final post comes.
Damn, my thread was going well then that fooking thread assassin came and now I don't think there's a living thread on here!
by Threadkilla January 25, 2015

When an individual changes the status on a friends facebook account that has been left logged on and unattended. The status is usually something terribly embarrassing.
Before status assassination--"Jesse is going to the grocery store"
After status assassination--"Jesse wears women's underwear because its sexy and comfortable, luvs it!!!!!"
After status assassination--"Jesse wears women's underwear because its sexy and comfortable, luvs it!!!!!"
by bee-ri November 17, 2009

Man #1: *Incomprehensible nasal ramblings*
Man #2: Whimper...*THUD*
Concerned Onlooker: That poor man has just been slaughtered by a nasal assassin!
Man #2: Whimper...*THUD*
Concerned Onlooker: That poor man has just been slaughtered by a nasal assassin!
by BringerOfWordsdom September 20, 2009

A npc from the game rune factory 4, who helps the protagonist of the game in multiple ways and even gives them a legendary dagger.
by Tittyspanker47 November 3, 2016

A young boy was walking down the street, little did he know his butt was about to be assassinated by the always leathal Butt Assassin.
by omgthatreallyhurt January 10, 2011

by Lucario6669 September 30, 2016

The greatest movie of all time. There's so much body dismembering and excessive amounts of blood that it keeps you entertained throughout the movie.
Guy 1: Man, i saw Ninja Assassin the other day
Guy 2: Oh me too, there's so much blood i could have sworn i was watching a documentary on PMS!
Guy 1: o.O
Guy 2: Oh me too, there's so much blood i could have sworn i was watching a documentary on PMS!
Guy 1: o.O
by The Notorious Poon Slayer April 15, 2010
