When it gets to that time of night, usually around 3-4am, and everyone is seshed up and been really nice to each other. This is also commonly known as 'licking each-others arses'. Best-mated differs from this because you are that drugged up and walking round using phrases like 'you lot actually are my best-mates' or 'just wanted to let you lot know that you are all proper nice people and i love you all'. When you see someone doing this; you can describe them as 'bestmated'.
Someone who is addicted to obtaining money and building wealth. A money addict and fanatic. Breadheads often work more than one full-time job, and some even participate in illicit activities to "obtain the bread".