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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
 
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