"If You See Kay" is a phrase which can be heard as spelling out of the swear word fuck. It was first used by James Joyce in his 1922 novel Ulysses:
"If You See Kay" has been used multiple times as a song title by the following artists:
Memphis Slim, 1963 R. Stevie Moore, 1977 April Wine, on the 1982 album Power Play Poster Children, on the 1991 album Daisychain Reaction Turbonegro, on the 2005 album Party Animals The Script, on the 2008 album The Script
See also "Foxtrot Uniform Charlie Kilo", a 2005 song by the Bloodhound Gang "If U Seek Amy", a 2009 song by Britney Spears
References
