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2.
polite way of saying 'shut up!'
''omg, will u people, CHAAA!!! I cant hear the tv."

"ay you, CHAA! talkiing to loud!
by misslaydee510 June 19, 2011
 
1.
An expression used to describe agreement to ones subject matter.. similar to yeah,yup or yes.. Branded by the group 80s Babyz / Pterodactyl Gang.. Pronounced with a long a sound like "Chad".
Person1:Are u ready to go to the studio?
Person2:CHAAA! I been waiting all day.
by Murph $krilla June 29, 2008