What is Buch?
1.
noun: A dumb shit; someone on the brink of retardation; someone with the inability to talk, listen, type, or even use sign language.
verb: to act like a complete moron; to embarass others in front of females.
"Come on man, don't be a buch"
or
"Stop buchin'"
See
2.
synonymous with the word "bunch",
but with greater emphasis on how hip the objects and/or people in the "bunch" are.
"I found a buch of vintage albums last night!"
"Lets get a buch of peeps together and party"
See