1) A smelly person who takes great pleasure and pride in releasing gas with people around him or her, often maliciously.
2) Also the person likes talking about farts and usually starts laughing uncontrollably when farts are brought up in conversation.
3) A 'lactard' who through years of not being able to process dairy properly, has accepted and grown proud of his or her uncontrollable flatulence
"I saw these girls with orange spray on tans at the mall today, I felt obligated to crop dust them. Afterwards I ate some protein bars to supercharge my farts for my next victim, which happened to be my little sister when she came to pick me up from the mall. Muhaha"
"Spencer, you fart centric bastard, I think you have a problem. Maybe you should see a doctor."