an uninvited or "envitado" who tries too hard to fit in and is more a nuesence than a guest. You great a rach simply "Hey rach!".. this person does not know he or she is a rach.
#2- in latin culture, people adress each other as "buey" meaning dumb ox. this is just like saying "dude" or "dogg"
you say "Hey rach!" with proper tone depending on how you ar applying it at the moment.
Hey rach. or, Hey rach!