1) verb - to use when the actual verb is awkward or inapropriate.
2) noun - appropriate to use when the real word cannot be placed in your mind.
3) onomatopeia - alternative of a curse word or similar sounding noises.
*Originally the name of a hotel in Mexico, this title was brought back as a new term of... whatever needs a term.
2) "Hey, Eileen, you got some xpu-ha in your teeth."
3) (DJ Otzi: Hey Baby) "Heeeeeey, hey baby! XPU - HA! I wanna knooww, ohh, if you'll be my girl."