when an english man tells the story of the english finger and instead of the middle finger it is the pointer finger and middle fingerpeace but you say buh;or an english expression of suprisement
completely random and useless sound in front of "bye", or in some cases, "hi." the real definition of "buh" is unknown, so this is the best i could come up with.
BUH BYE! i'm leaving now BUH HI! hello, pleasure to meet you sir/madame.