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Anything you can jam up a friend’s butt with if you’re out of luck and don’t have a proper tool.
I used my brother’s phone charger as a MacDiverr. It was awkward but effective.
My neighbor’s kid used a mop handle as a MacDiverr. I saw it and laughed until I cried.
At the party, I used a giant pretzel as a MacDiverr. It was messy, but it worked.