Flat stack 

The baddest boss you ever worked for

You see that deal he managed? That's why they call him flat stack

Flat stack by Le Grande Queso November 28, 2016

Flat Stack 

1. Someone who made one thing they enjoy their entire personality

2. Someone with nothing really unique or outstanding about them.
3. This is another form of `basic`.

Did you see that girl over there?

Yeah she is nothing but a flat stack

Flat Stack by Deepandhard December 4, 2022

flat sack 

When you go to have sex with a guy and realize he has no balls.

I was 69'ing with this one guy and his flat sack hit me in the face.

flat sack by hen-peter October 23, 2011

flat stackables

paper money

Martha look at all these flat stackables. I'm a gunna buy me a right nice double wide trailer. -jeb

flat stackables by woody May 25, 2003

Flat sack 

One who has no balls, a neutered dog. Just a sack with no balls.

Hey wade you have no balls you are a flat sack

Flat sack by Cuevous May 28, 2016

Flabstacks 

An insult originating in Hull and now spreading across england referring to someone who is either very fat or someone you want to call fat.

"Hello Roan"
"Oh get lost Teal ya flabstacks"

Flabstacks by Harry Smidge April 13, 2010

Flagstacker

a term definitive to someone who repeatedly has sexual intercourse with less than desirable women. The unattractive women are the flags, and stacker means he's stacking them up.

"That nigga Jim a flagstacker fo' real"
"Man, did you see Jonny last night? He stacked 6 flags dawg"
"Flagstacking ass niggas up in this bitch tonight"

Flagstacker by BigJimandShady July 29, 2012