A Smoothie is someone with a smooth brain, who is stupid. Koala bears have smooth brains instead of wrinkled brains and are notoriously stupid animals.
"Bugga me m8, looks loik we got ourselves a propa smoothie!"

"This comment section is full of smoothies."
by EDKirk March 14, 2019
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A smoothie is a cold, fruit-based blended drink. It is usually composed of a variety of fruits and sometimes yoghurt to thicken the concoction.
"I ordered a strawberry-banana smoothie with a mutlivitamin booster and it was go-od!"
by Rudie February 23, 2006
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a girl who shaved her pussy!!
(sweeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeet!!)
that girl was such a smoothie!!
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"You know, the thang you be smoothin out your clothes with"
by Mike the Piump February 26, 2003
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A non-dirty sounding way to refer to oral sex, regarding both males and females, also known as cunnilingus or fellatio.
"I didn't get laid, but she sure gave me one hell of a smoothie"

"He has no clue how to give a decent smoothie."

"Sure, I got some light smooth, but it was not to completion."
by The Situation April 22, 2009
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