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The plastic part of an alcohol bottle at the spurt that controls the flow of alcohol into your mouth.
Nick removed the fun stopper from the bottle so he could chug the Handle more effectively.
by Walter Hopkins IIIIV October 11, 2011
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May 29 Word of the Day
Mercury retrograde is the act of taking a shit whilst mooning one or more human beings. Your day can typically being going well, according to your horoscope, until you are forced into witnessing Mercury retrograde. Performing Mercury retrograde will often speed the astrological cycle forward for the individual performing the Mercury retrograde, bringing about happy and fruitful times to come.
As the sun sank down over the pier, the children fishing gazed in horror as the lard-ass on his flat bottom boat sent the lakeshore into Mercury retrograde.
by BatWingg May 17, 2021
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2
the plastic contraption that is placed inside the tip of liquor bottles to regulate its flow of contents (the fun).

people often remove the funstopper to pour their liquor of choice at a much faster rate, causing a better time for everybody.
Guy 1: Man hurry up and pour those shots!

Guy 2: It won't pour any faster man sorry.

Guy 1: Take the funstopper out first and then the party can really begin!

Guy2: Man you are soo right.
by beerboozebroads December 21, 2011
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