Ooplang 

The practice of keeping a portion of VAT, collected on behalf of the Tax Man, instead of declaring the full amount then hiding it from the government.

Most common people who practice ooplang are those who reside in a small Indian township of Pretoria, South Africa known as Laudium.

Indians who hide ooplang generally stash the money under their mattresses or in air tight packets which are sealed in jam jars and then thrown in the swimming pool.

Ooplang by Pravin Bhai November 3, 2012

Oopling 

I tiny poo.
A turd someone makes the size of a rabbit shit.

One little droplet of shit coming out of your ass and that's it.

I trusted a fart. Bad idea, I let an oopling out.
I was on the toilet and only let out an oopling.

Oopling by Big_Butta October 10, 2019

oopdang 

oopdang is a slang term for the word Downy derived from Australia.

oopdang is mainly used as a insult towards another person.

Your such a oopdang.

Go get a job then you oopdang.

Kratos

oopdang by small-sk8er June 5, 2010