waifu

Used to refer to a female fictional character that the user experiences attraction to.

The term originated from the manga Azumanga Daioh, where character Mr Kimura uses the term to refer to his actual wife. (Yes, the original definition is literally just "wife" in Engrish.)

Guy 1: "(insert character here) is my waifu"
Guy 2: "(insert tangent about Azumanga Daioh)

Waifu

Speedwagon

Speedwagon from JoJo’s Bizarre Adventure is the true definition of a waifu.

Speedwagon has all of the attributes of a true waifu

“The real waifu is speedwagon”
“Agreed”

The Waifu Property

The need/want to throw aside reality and spend your life playing video games in order to spend time with your ultimate waifu.

Person 1: Why do you think he plays games all day?

Person 2: Dude, obviously because of The Waifu Property.

Nameless Waifu

A cute waifu in music videos by a channel ( the one with blue hair )
Channel: just search "kisagari station song" and you'll see the channel

The channel makes music videos of japanese urban legends and uses the waifu in the thumbnails and the video

"Nameless waifu is so cute!"
"Lol simp"