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1.
A person (man or woman) who pretends to care only when it benefits his or her agenda. A phrase to describe an insincere, sociopathic person who furthers their cause using fake or false concern.
"You can't slack off all day at work and then get all Charlie give a shit when the boss comes around"

That dude could care less about this company until our investor comes around and then he's fucking Charlie Give A Shit
by Charlie gives 2 shits January 21, 2010