Any suggestions on any ab workouts?

awesomeguy23
i have a 6 pack already but want a bigger/ better/ more defined one, any suggestions on any ab workouts? I don't have any weights all I have is dumbbells and if possible maybe some suggestions on some bicep workouts as well, I have 5 pound dumbbells and I have a big exercise ball.
Any suggestions on any ab workouts?
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