The actions and emotions a person shows when they are on the toilet and trying to shit something big...and it hurts. Similar to the emotions and actions while preparing for a roller coaster dive with the rejoicing hand raise at the end (woohoo!).
I didn't shit for days but when I did it was a roller coaster shit!
by Gabrijela Ester May 8, 2012
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Some one with a curved or obscure hairline, it is used as an insult.
Amin's hair goes like a roller coaster.

"Samers hair is so crooked, ". "That boy got a roller coaster hairline!"
by WestSideKilla December 9, 2016
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(N)'Tokyo Roller Coaster' is the name for the process of defecating into someones japseye. It is mainly performed as a sexual act, celebrating the art of sodomy by the unorthodox reversal of each orifice's role.
However, the japseye may also function as a temporary waste repository, if it is sufficiently cavernous.

The name is derived from the reference to Japan in the term 'Japseye', and roller coaster is a reference to the rapid decent of undeposited feces towards the ground.
Isn't it funny how you always find a kernel of corn inside it, after being performing a Tokyo Roller Coaster?
by PMJR-Dan June 6, 2006
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When one alternates between lines of cocaine and smoking marijuana continuously, one is said to be "riding the roller coaster".
Jim: Has the Baweej been smoking weed and doing lines of coke all night?
Marty: Yeah, he's been riding the roller coaster.
by Jegster July 14, 2010
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An analogy between activities of a sexual or romantic nature and a roller-coaster, or any amusement park ride. According to this philosophy, the engaging in sexual activities with a partner one does not find aesthetically satisfactory in order to receive a similar treatment from his/her far better looking friend is equivalent to waiting in line (a mundane and unpleasant activity) in order to get on a roller-coaster (a thrilling and exhilarating experience). The roller-coaster principle may also be used to describe the opposite: waiting in line for an amusement park ride that ultimately is not worth the wait. Details of the roller-coaster riding experience also directly apply to the metaphorical analogy. For example, vomiting on Kingda Ka would be the equivalent of vomiting while having intercourse with Meghan Fox. The Roller-coaster Principle, so long as the roller-coaster is in fact superior to the wait in line, exempts any male or female from being ridiculed for "waiting in line".
Can also be defined as "exploitation and manipulation".
Guy 1: As one of my closest friends, I simply cannot allow you to accept that female's offer of fornication. She is simply horrendous!
Guy 2: You mustn't forget that said lovemaking increases my chances of performing similar acts on her tantalizing and voluptuous compatriot without need of Roofies!
Guys 1 & 2 in unison: THE ROLLER-COASTER PRINCIPLE!
*Highfive*
by supercoollad July 4, 2010
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Some one with a curved or obscure hairline, it is used as an insult.
Amin's hair goes like a roller coaster.

"Samers hair is so crooked, ". "That boy got a roller coaster hairline!"
by WestSideKilla December 9, 2016
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That pleasant tingling feeling one gets in the groin area when going over a hill while driving or riding a roller coaster
Drive over that hill over there, I guarantee we would get nice cases of Roller Coaster Wang Syndrome.
by bliff July 21, 2011
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