Secretary’s ass 

This a term use to discribe an ass that is flat and spread out. secretaries usually have flat spread out asses due to prolonged periods of sitting. The term could have been interchanged with any profession that sits alot but secritary was generally understood to be a long sitter.

Person A:Dude, your bitch has a Secretary’s ass.
Person B: fuck, I know

Secretary’s ass by B-dub (refers to my age) November 18, 2005

Secretary's ass 

When your butt gets flat, wide, and jiggly from sitting so much (i.e. studying for finals, at a desk) without going to the gym.

Damn, I've been studying for the LSATs for so long, I'm starting to get secretary's ass!

Secretary's ass by Caligrl887 September 9, 2009

secretary ass 

Secretary Ass: when the top half of your body looks normal but you get up and your ass has to go through doorways sideways.

This bitch at work seems cute; then she got up and she had such a secretary ass!

secretary ass by JMAC145 April 20, 2016