Top Definition
1. If something isn't working right....

2. To be cheating on your other half
1.AWW my cars playing up it won't start!

2.See that guy Bob...He's playing up on his wife...
by shaktisaurfang September 12, 2010
competing in a league that is above yours in skill level.
When 10-year-old plays baseball in a league for 12-year-olds he is playing up.
by Statsclimber September 22, 2010
When a certain induvidual cannot control their behaviour
Bro stop playing up, i cant help it been on the piss alday
by bpnz June 11, 2016
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