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1.
slang conjunction for "go on ahead"

1. Confirmation of a positive act. A supportive comment.

2. a "passive aggressive" threat foreshadowing that bad things will happen if the behavior in question is acted upon
1. You: I just hit three bulls eyes in a row!
Me: Gon'ahead with your bad ass.

2. You: I'm going to change the channel cause I am tired of watching BSG
Me: gon'ahead and try it and see what happens fool.
by Greakan October 13, 2008