Used to represent a sly grin or a smirk in an Instant Message or SMS conversation.

When you copy and paste "!1!1!1!1!1!1!1!1!1!1" and go too far.

used at the end of an extremely sarastic statement

Something that you out at the end of your sentence to be sarcastic

Used to make a sarcastic statement even more exaggerated.

the repeated usage of 1!!11! indicates the sarcasm after a phrase, sentence, or word.
for example
-" i hate you for saying that!1!1!1"

A term used to describe counterfeit goods of extremely high quality, so much so that they look identical to the authentic product.

Commonly used on r/fashionreps and among other counterfeit clothing communities.