Helen Newstead, head of language content at Collins, said that one reason for the influx of words was down to the "exciting era" of Internet and social media we live in.
"The Internet age has revolutionised the inclusion of slang in dictionaries and Collins Official Scrabble Words is no exception. Dictionaries have always included formal and informal English, but it used to be hard to find printed evidence of the use of slang words," Newstead said in a statement.
"Now people use slang in social media posts, tweets, blogs, comments, text messages, you name it so there's a host of evidence for informal varieties of English that simply didn't exist before."
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In August 2014, Merriam-Webster's fifth edition of "The Official Scrabble Players Dictionary" added phrases such as "chillax" and "frenemy."
The highest number of Scrabble games played simultaneously to date is 521 games, by 1,042 participants in Singapore in March 2006, according to the Guinness World Records.