A typical excuse given when someone doesn’t want to attend a function but has no legitimate reason not to
Matt: Hey do you want to go to the crawfish boil on the 2nd?
Anyone Matt asks: Sorry Matt, I'll be busy washing my hair
by Faptastic Max April 22, 2015
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A polite alternative to telling someone to 'fuck off' when asked on a date. Often used by Christians and others who prefer to let someone down gently.
"Thanks for the offer, Rich, but I'm washing my hair that night. Praise the lord"
by Urbanbond May 2, 2014
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