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'.
'Look at Jimmy! He's bestmated!'
by pyurpyur August 22, 2017
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