Essentially it means "watch you get down and dirty at work".
Can also mean "get to work".

Can also mean to engage in sexual foreplay, or more.
Girl to DJ: I cannot WAIT to watch you sling the hash on Saturday night! It's gonna be totally Mexico.

"So I told him, stop chatting to me and go sling the hash! We have a deadline!"

After leaving Smart Bar, we went back to my place, and slung the hash! lol
by kittenmalibu May 11, 2010
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Working in a restaurant as a server/waiter or anywhere in the "front-of-house" on the service side (not kitchen). Originally coined for the fast food, greasy spoon, diner waitress.
After losing her job, Alice was slinging hash to keep her kids fed.
by womp'm March 22, 2008
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