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MONO = ONE
RAIL = RAIL

One-rail mass-transit, you can find one in Sydney.
"I'm the best monorail-driver ever!"
-Homer Simpson
by w00dy January 20, 2005
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2
Mono means one and rail means rail.

Sydney's monorail exemplifies excellent town planning, just like the popsicle stick skyscraper, the 50-foot magnifying glass and that escalator to nowhere.
Lyle Lanley: The monorail put Sydney on the map, next to Brockway, Ogdenville, and North Haverbrook.

Sydney: Mono...doh!!!
by santa's little helper April 04, 2012
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3
for a girl to grind a guy who is laying down, esp. with his penis between her labia minora
I couldn't get her to let me inside, but she did take a ride on the monorail.
by Rod X February 14, 2014
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4
When an individual is held down against their will whilst an agressor positions his buttocks either side of the poor soul's nose. The "crack" is then rubbed up and down the face in a straight line, mimicing the movement of a monorail.
The group thought it would be funny to take Ed down a peg or too, so they held his arms and legs in order to allow Rhodri to monorail him.
by Benjamin Shrewpert November 28, 2006
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5
When two guys put the tips of their erect dicks together and one guy strokes both dicks like it is one large dick.
gay man sex is fun when you monorail
by 596A December 11, 2010
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When you get an old guy (preferably my g-pa) throw him on the ground and have him take a dump upwards like a train moving at high speed, and as the shit is coming upwards grab a condom and shove it over that then ram it in your ass like a monorail train thing.

SIDE NOTE: Lube might be helpful.
So last Christmas instead of giving grandpa the train set he's always been dreaming for, we performed a nice long monorail instead!
by Danielle The Pimp January 18, 2010
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A term to describe the passing around of a drink (usually alcohol) in which everyone's mouth drinks from the same opening. This is very common in situations where people are looking to drink fast and don't have the luxury of cups.

The term is derived from the disease Mononucleosis (mono), otherwise known as "the kissing disease." Which is transferred by saliva from an infected person to the lucky recipient.

Monorail is also taken from other phrases such as "jump on the band wagon." However, this mode of transportation is a one railed train first invented in the early 1900s.

The phrase then is said to cue someone to take a drink, while joking that they going to get mono because another person, or many, have already drank from it.
Can i have a sip?
Sure, hop on the monorail!
by TheJester108 July 29, 2011
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