"Off like a Prom Dress"

When I hear, "I'm off like a prom dress" I assume that person didn't have a date to the prom.  On prom night I'm sure you were off playing video games - unless there are prom dresses in the Modded version of Quake you were playing.

Thanks for hanging out, but i have some errands to run - so I'm off like an Orange rind in a scurvy outbreak.