The guilt projected onto a person that doesn't want to or believe in taking the flu shot vaccine.
You say "No" meaning "I don't want you to inject me with formaldehyde & mercury" and the nurse gives you the flu shot guilt by sending you a look like you just said "there's no such thing as God."
Los Angeles slang for someone who makes money by robbing, most commonly home invasions or "flocking." Although it seems its taken a new meaning on Urban Dictionary.
I'm a real flu flammer nigga I just hit the asian folks house in Westwood and prayed to their buddha.