A dude who finds the excited "yes" atmosphere of a birthday party to be prime hook up territory. Likes parties, but especially birthday parties. Typically male. Commandeers attention away from the birthday person.
Similar to white girl wasted, birthday baked means a middle class person or someone on a budget spending more on marijuana for their birthday as a treat to themselves.
Dave: What are you doing for your birthday?
Harry: I just got paid so I'll probably visit my dealer and get birthday baked.
John planned to get birthday baked and therefore had to buy more snacks than usual.
When someone passes out and you put small pieces of paper between their toes and light them on fire to watch them kick them out in a violent stupor
A dude passed out and we immediately birthday caked this guy, he got up like the grandpa in Charlie and the chocolate factory. Birthday caking shout out the bodega hive