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1.
Bad tempered attitude whilst playing racket sports, bringing to mind the rantings and/or racket abuse of John McEnroe.
Mike: (Playing a bad shot) GOD DAMN IT!!

Pete: Man, you got some real bad Macitude today.

Mike: (slamming racket against wall) Whatever dude...
by mikeyfingers November 15, 2009
 
2.
When everyone in a room or given space is on a Macintosh computer.
Dude, can we observe this macitude right now?
by macitudelovr June 22, 2009