James Joyce's fucking fuck
If you see Kay,
Tell him he may.
See you in tea,
Tell him from me.
From James Joyce's "Ulysses." I had never heard of this one before though I am sure that there is more than this that I have missed in my one reading of "Ulysses" thus far. Notice also, the 'cunt' reference. Another famous four letter word that people cringe at.
http://www.themodernword.com/joyce/joyce_paper_conley.html