n. the secret pathway that you put your extra food on when you're at somebody's house that does not like to waste food. In the Underground Food Railroad, you must work as a team to get rid of the extra food. This is usually used when there is a buffet and you accidentally get too much food.
I got too much food at the buffet... Granddad will be mad...I think I'm gonna use the Underground Food Railroad...
by kk4444 December 26, 2011
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The sexual act of going down on a girl and vaping into her vagina
My boyfriend cannot stop vaping! Last night he vaped in my pussy and called it and Underground Railroad. It kinda tickled though.
by Chu Chu Twain December 17, 2015
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The act of two males having intercourse with a single female a.k.a. "running a train" while under the bedsheets. An underground railroad is exclusively when this act is done by African Americans.
"Yo, I heard you and your bro ran an Underground Railroad on Shanockquolisha last night!!"

"Hell yeah! That sh*t was insane!!"
by TheOneAndOnlyHalfnHalf October 3, 2011
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