Cute sounding abbreviation for "I love you". Can be used as a full sentence to express your love for your significant other. Is mostly used in written conversations. A typical response can be "iluvutu" for a simple sounding "too".
Pronounced (if-luv-a-flu) from the latin iflovafluito, meaning to describe love so insurmountable it can't be described by words, umm other than this word I guess.