Another word for the male genitalia, penis, cock, or shlong. Refereeing specifically to the penis when fully erect. The phrase comes from the word “mirth”, meaning happiness, joy or pleasure, when also combined with “rocket”. Mirth rocket directly translates to “pleasure rocket” which can be interpreted as a slang word for the erect penis.
Hey baby, you want to get some dong bags and hop on the ole mirth rocket.
by skitty April 25, 2008
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A sky blue AMC Pacer with flames above the tires can be a personally owned vehicle but was originally found in the greatest movie ever Waynes World.
"Great idea Garth, To the Mirth Mobile!"
by Zach is Cool December 9, 2005
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The car driven by Wayne Campbell and Garth Algar in the movies "Wayne's World" and "Wayne's World 2".
To the Mirth Mobile.
by ajajaj October 28, 2007
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A term used to describe one who ridicules and laughs at stupid people, and basically someone who is just generally cool.
Russell's dad is a butcher, but the meat was crap. I told him, he cried, and I laughed like a true stallion of mirth.
by Grant Hayes October 4, 2005
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When someone laughs, but they don't make a sound.
You know you're a nerd when you mute mirth at a sucky joke.
by mute spitting November 21, 2013
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Coolest guy in the tristate area we know as the Northwest. Makes a mean Taco. Doesn't dance. Can't sing.

Was born in Kirkland
Mirth Prolan makes sandwhiches look disgusting.
by Darby Janssen December 8, 2004
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mirthpants! my package has arrived!
mirthpants! the dog bit my leg and it's bleeding a lot!
by baron December 24, 2003
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