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chillax

[chi-laks]
verb (used without object) Slang.
  1. to calm down; relax; chill.
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Origin of chillax

1990–95; blend of chill (in the slang sense “to calm down”) + relax
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for chillax

chillax

verb (intr) slang
  1. to take rest or recreation, as from work or effort
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Word Origin

C20: chill (sense 3) + (rel) ax
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012