Latin/English sound pun. The direct translation from
Latin to English is "Always where under where." When spoken it comes out as "Always wear underwear."
A previous entry mistranslates the
Latin word "semper" as "never." It is of course "always," as in the US Marine motto, Semper fidelis "Always faithful."
In an episode of "
Frasier," the
father finds the phrase "Semper ubi
sub ubi" carved into the hearth in a mountain cabin the family rents, and Niles explains it to him.