A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.
That fucking smooth brain put his shirt on backwards again...

That smooth brain is dumber than a pile of shit.
by Tip Tank May 15, 2011
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Someone talented at using verbal communication to get what they want from a situation, such as persuading someone.

The word is often used to describe men who are skilled at seducing women.
- "I picked up a girl at the bar last night."
- "You're such a smooth operator dude."
by gregolego May 3, 2020
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(1) A cad, rogue or bounder. A highly-functioning, charismatic sociopath who has a purely instrumental view of others. Treats women like objects and vice versa.

(2) A medium-sized shark in the genus Mustelae.
(1) "You cheated on your Cambridge finals, sold crack to your aunt, gave the hiv and the herp to many student nurses, and later became the chairman of an investment bank. What kind of man are you, for God's sake?"

"I'm a smooth-hound. That's how we roll."

(2) "The smooth-hound is a very ordinary shark; its name is the most interesting thing about it. Smooth-hound."
by Hitmouse December 12, 2009
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Carlos Sainz😌
Carlos:
- Tom do you know what that was?
- that was a smooth operator
(Smooth operator by Sade)
by Chilly111 December 25, 2021
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Something you just got hit by.
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You've been hit by—
A Smooth Criminal
by Biggest Boye May 10, 2018
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J: O, you have a smooth brain
O: Does this mean I have a cute brain?
*L, M, N, O, and P all start laughing*
by Ace the simp May 6, 2023
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Pinkly Smooth is a band created by The Rev and Synyster Gates, Avenged Sevenfold's drummer and lead guitarist. This band is a side project, and displays The Rev's vocal talent.

Band members: Rat Head (Jimmy Sullivan)-Vocals, Synyster Gates (Brian Haner)-Guitarist, El Diablo (Buck Silver of Ballistico)-Bassist, Super Loop (D Rock of Ballistico)-Drummer, and Justin Meacham-Pianist

Their first album was released in 2002 titled "Unfortunate Snort". So far that is all they have released.

Ex: Pinkly Smooth is rocking my stereo!
by HollDoll February 25, 2008
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