to agree with someone with great vigor; indeed to the extreme
"Hey Jeremy this new video game is great!""Infuckingdeed it is Ronnie."
A form of the word "indeed", except this one means buisness.
Disgruntled Homeowner: I got rats in my attic!
Rat: Infuckingdeed!
to agree with someone with great vigor; indeed to the extreme
"Hey Jeremy this new video game is great!""Infuckingdeed it is Ronnie."