Boo-gee (or Boo-shee) means a person who is financial secure in life (and sometimespretend that they are). They can be 'uppety', pretentious, and or very vain and self absorbed.
"Look at that girl with her nose stuck in the air. She looks very bougy."
or
"Oh, I know him."
"Yeah, you don't wanna know him. He's very bougy."