A type of muffler that is mainly found on rice burners(toyota, nissan, etc.) that lets out a low-pitched hum to make the car sound like it has some power.
Dumbass: Dude! that supra sounds awesome! I bet that thing could tear it up on the quarter mile!
Smart person: No, that's just a shit whistle. The car will probably pull about a 15 sec. 1/4 mile.
by The REAL Moonshine December 20, 2005
the anus. aka the asshole.
I fucked tonya in the shitwhistle
by Stefan the terrible May 26, 2004
A particularly tight non-violated ass-hole. Lets off a high pitched whistle when air is force out under pressure.
I blew your mum up the shit whistle last night!
by Dirty Pablo September 15, 2003
Any type of low-quality, whistle tipped cigars; most notably of the Black and Mild variety. Often smoked by frat boys and teenagers in an attempt to look classy.
Person A: Dude, I'm bored and we've got no ganja.
Person B: Wanna go to Giant Eagle and pickup some shit whistles to look like douchebags?
Person A: Sure, why the hell not?
by Mighty Maxwell June 15, 2010
A type of small, handheld flute made of dried and aged fecal matter.
"What do you mean he doesn't want to hang out with us?! Tell him he can go suck a Shit Whistle!"
by Wrex, from The Normandy Crew March 04, 2013
An expression of displeasure.

Synonym: Shucks
Example: "Adam, it looks like you stepped in dog shit..." "Aww shitwhistles!"
by BBaylor400 July 07, 2008
A type of muffler that is used for shitty cars (mostly rice burners such as toyota and nissan) that makes a very low-pitched hum. Shit whisltes are used to make the cars seem to have a sizable amount of power and/or speed. When rubber meets the road however, the car proves to be a heap of shit.
Dumbass: Dude, that supra sounds awesome! I bet that thing could tear it up on the quarter mile!

Smart person: No, that's just a shit whistle. The car will actually run about a 15 second quarter mile.
by The REAL Moonshine December 18, 2005

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