This article is from the soc.culture.australian FAQ, by Stephen Wales with numerous contributions by others.
Originally the brand name of a non-alcoholic beverage that looks like
neat Scotch whiskey, the television commercial featured Australian
actor Jack Thompson(sp?) sitting at a pub bar and ordering "I'll have
a Claytons' - (to camera) the drink I'm having when I'm not having a
drink" Almost immediately the press media used "Clayton's
Promise(chk?)" to headline a politician "making a promise when you're
not making a promise". It now has accepted usage as a derogatory
adjective of anything that has questionable authenticity. (Victorian
usage anyway) [RK]
 
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