Back on is when a person or people stand on the outside of the back of trains in Sydney particularly on Tangara and k set trains
by WHIPSZ April 27, 2023

by Abreathofaversaillian January 20, 2025

Threesome position where the female lays across the lap of one male, reaches behind and gives him a hand job while the second male kneels beside his buddy and slams her ass
by flapjackal August 3, 2015

Oh? Oh!
Hym "We're back! Back in the pack! We in here! All up in your brain-mind once again! We have returned!'
by Hym Iam November 13, 2023

To smugly turn and face the opposing direction of an intended audience while having a full fledged conversation usually when it is business critical
*Three People speaking in a triangular formation; one of them is turned with their back to the other two, while the two are in avid discussion*
Lizzy- "Dick, hey I'm trying to communicate a few critical things that need to happen by the end of your shift"
Dick- "Oh, is that what you call it." Hmph (back turned to Lizzy, facing Barnaby)
Barnaby- "Did it not occur to you: You're flat-backing your boss... dick"
Lizzy- "You are a dick, Dick"
Lizzy- "Dick, hey I'm trying to communicate a few critical things that need to happen by the end of your shift"
Dick- "Oh, is that what you call it." Hmph (back turned to Lizzy, facing Barnaby)
Barnaby- "Did it not occur to you: You're flat-backing your boss... dick"
Lizzy- "You are a dick, Dick"
by BMiller58 December 24, 2022

by Fricky-Fresh August 4, 2020

Describes someone so outrageously drunk they end up horizontal—usually on a couch, the floor, or wherever gravity decides they should be. Comes from the image of someone literally being on their back, flat as a pancake, because standing is no longer an option.
by Handle Not Found July 12, 2025
