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Japanese for flat. Can be used to say a girl has small boobs.
Gura is not boing boing, so she is hydrodynamic and also pettan. Ame however, has two big floaties to help her swim, so she is not pettan.
Pettan by Wordbert December 6, 2020
Related Words

Pentanium 

A derivative of the 'Pentium' processor used by non-tech saavy consumers when looking for this type of processor.
"Excuse me, do you have any Pentanium processors? You see my hard drive in my modem caught on fire and I need to replace my Pentanium."
Pentanium by Kevlar D November 10, 2007
Made up by George Ezra, meaning cool, awesome, amazing, or anything you want it to mean
That song is so petan!! Keep your peckers up!
petan by trutru2 April 5, 2015
In anime and manga, a flat-chested girl who is obsessive and/or insecure about this fact.
"You're into that anime girl? What are you, a lolicon?"
"She's not a loli, she's just a pettanko."
pettanko by theflying_clubcup January 24, 2009
exclamation/noun, vulgar
From the Maya "Peel a ná!" (lit. "your mother's vagina")
The unpleasant image of your mother's reproductive apparatus
1. Used to express unpleasant surprise:

"Pelaná, esa perra me mordió" (Fuck, that bitch just bit me!)

2. Used colloquially between male friends (similar to güey or dude ):

"Que honda, Pelaná?" (What's up, bro?)

3. Used literally (rare):

ROBERTO: "Oye, Pelaná, ba'ax ka jantik?" (Hey dude, what are you eating?)

CARLOS: "Pelaná" (your mother's hoo-ha)
Pelaná by DonnaPesce April 15, 2017
Nation of Gods & Earths slang for the Bronx borough
"In the Boogie Down Bronx, BKA Pelan"

Just-Ice on "Going Way Back"
Pelan by Loc-O November 19, 2013