a very affluent person. can also be used in adjective form.
shouted alone, the word "bosch!" can be used as a justification for only carrying plastic (credit cords, mate) or making a reference to not being a focking skobe or pleb. the phrase can be teamed brilliantly with a smug look on ones face.
must not be confused with "bosh" which is merely a focking douchebag's attempt at distinguishing bosch(ledge) with bosch(kitchen appliance brand). However this is highly unnecessary and not well received amoungst the truely bosch community.