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Combination of words knife and waifu. Often a tool of choice for a yandere, so the expressions are often linked together.

Expression also became popular among World of Warcraft players as a nickname for a dagger called Xal'atath, which would occasionally talk to the wielder in female voice.
Cock my uzi, grab my knaifu!
Stab you like a yandere, "¡Ándale!" Bitch I'll end yo' laifu!
Knaifu by Vizna November 14, 2020
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Knaifu is similar to Waifu but this time are types of knife we love to use
Jeff: I love you my Knaifu
knaifu by Yandere Queen September 19, 2016
Related Words
knaifu knifu kaifull kaifullo Knifun Knifury
An anime girl mixed with a knight (Plate mail...)
Yo look at that Knaifu!
Ikr looks hot
Knaifu by L()K1#8311 August 4, 2020
kaifull means that kai is goood and anyone name kai is very kaifull
That statement wasnt very kaifull bro ong
kaifull by Ikbir November 11, 2022
A mix of the nouns knife, and fury, and the word knifery (if that were a word)
Person 1: Sharping blade ...
Person 2: LOOK, A DISTRACTION! I am attempting to distract you from your knifury ...
Knifury by BigAlphagettiP December 16, 2011
Person 1: want to blow my knifu?
Person 2: sure!
knifu by waifucfacga February 1, 2021

kaifullo 

i have a kaifullo today to sleep with
kaifullo by kaif shefi February 21, 2021