Slang = It's good, It's alright, I'm alright.

It is short for = Всё в порядке = Everything is in order.

Позвонил друзьям и спросил как дела у них,
"всё в поряде давно не слышали ты чё притих"

I called my people and asked how they are,
"Everything is fine, havn't heard from you in a long time, what happend?"

девушки в поряде, все как надо

The girls are fine, everything is ok.