An elphie is a name commonly given to a total douche who has no idea that he is, in reality a super ultra mega douche!
Upon being born, the elphie-to-be is immediatley identified by the parents and named as such to warn all who would meet him to quickly punch themselves in the crotch, and escape thankfully to hospital to secrete themselves away from his douche-like presence
Cool dude: "Man, that dude is a total elphie!"
Other cool dude: "What a douche! Quick, punch yourself in the junk so i can escort you to the doctor!"
Cool dude: "Aw hell no! Lets just punch the elphie in his junk instead!"
Other cool dude:"Aye aye captain!"