Crappy song by Meghan Trainor that's supposedly about how the bass guitar is like the thickness of a song or the bottom, relating to the body like that, yet it doesnt even have a bass drop or any real bass that can be heard over the shitty melody and fake ass lyrics.

It's become popular because it inspires obese woman despite it being a fucking terrible song, even the one singing it is fat, and they even include a fat guy in the video, it looks like she's trying to make fun of herself.
400 pound woman: Yeah i'm all about that bass.
Ideal body weight woman: Shut the fuck up already you're a fucking hippo.
by Ferb City October 18, 2014
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A saying used by some people that wish to appear "hip and with it" but in reality they don't really have any uniqueness about them. They simply spend the money and convey the attitude that they "have it" while making sure to be seen with the "in crowed" at social events, or at least talk about "the other night" when they were with the popular main-streamers.
"hey mang, its 'all about them franks" yo yo"
by Charlie Greens April 11, 2007
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An idiom used when an observer notices their friend engaged in an extremely self-centered digression. Serves as a reality check. Inspired through the interactions of siblings: Charlene and Sherwin.
Sherwin: And then, at the tender age of 12, I got my black belt in teakwondo, and then I won a bunch of awards in school and soon you'll be calling me Dr. Sherwin.
Charlene: Well "it's all about meee meee meee" isn't it?
by hommie-g November 9, 2014
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Used when describing a hobby, pursuit, or interest about which you are incredibly enthusiastic. This can be applied in a wide range of situations, but is typically used to describe the extent of one's appreciation for one's favorite things.
"I'm all gay about China."

"Hey man, have you seen any episodes of Friday Night Lights?"
"Oh, totally, I'm all gay about it."
by j2shawty August 27, 2009
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Amish term for being out of something.
The salad dressing is gone.
"The salad dressing is about all"
by Vampiricos July 2, 2006
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meaning that regardless if you have a small or large penis, as long as you give the girl pleasure, then you have absolutely nothing to worry about
girl: how big is your cock?
guy: 6 inches
girl: ok, i'll go with that
guy: you need to understand that it ain't all about the size of the boat, it's about the motion in the ocean
girl: yeah, yeah whatever.
by choppaz-n-ninez January 3, 2008
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