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1.
A combination of the words 'Mellow' and 'Relaxing'.

Meaning: 'Mellowly relaxing' or 'Relaxing in a mellow state of mind or body'.
'Just had a nice j outside, came back in, switched on the xbox and chilled in bed, melaxing to some Game of Thrones'.
by bsj41 May 05, 2013