Basicly, any adjective followed by the word as, increasing the strength of the adjective.
Originated from New zealand.
To describe that it is cold: "its cold as bro, cold as a chili bin bro"
To describe that you think something is stink(unfair,stupid):"stink as man"
Generally this is one of the most used phrases in New Zealand "____ as"
"Bro I cant make it to the party tonite"
"Oi Mrs Coles failed me on that assessment!"
"Thats shit as man"
"Bro _____ Happened"
"Man, thats adjective here