Stands for "Fuck Your Mom"

3 words is used when saying "fuck your mom" is not appropriate or if there is a child in the room. Instead of saying "fuck your mom", you say "i have 3 words...first word..." and it is understood from this point on that you mean to fuck whoever's mom.

a thread on a forum that helps increase everyones post count

stupid rule that urban dictionary made

The third movie in the series of movies known as Word where the Numbers kill all the words except for those with the letter E.