Originally Posted by cerewa
If your armpits are already stinky and you want them to stop stinking real fast, try rubbing alcohol. It's one of the more effective antiseptics out there...
Mind you, after you use it you'd do well to put some deodorant on.
Old spice works pretty well for me.
Lots of deodorants have a high alcohol content, so you could just do both at the same time.