Is there a halachic issue with invoking the name "Peter," or, as is more commonly used, "oh, for Pete's sake!," which I assume is a reference to Saint Peter. Wikipedia agrees with this conjecture, albeit without a source; see also "Oh, for Pete's sake!" on English.SE
As far as I know, nobody treats Peter as a deity, but he is a saint. Is there an issue with saying "oh, for Pete's sake!," due to his being a saint?