What is Second-hand Mayonnaise?
1.
Excess mayonnaise that has been wiped from a butter knife to the edge of the mayonnaise jar.
"I can't reach the bottom of this jar, but the second-hand mayonnaise at the top has bread crumbs in it."
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1.
Said randomly to make the speaker appear smarter than they are, and to insult the person they're responding to.
"Dude, I&apos..