Something you say when things are going well or if you're just pretending that's the case.
It is versatile and can also be used however your squanch tells you.
E.g. 1 - "Bro I can't believe you lost that £100,000 bet"
"Yeah it fucking sucks but we fartin"
E.g. 2 - "MY DRILLA how you doin?"
"we fartin, hbu?"