Saying something 'ist kreig' means it is extreme, or 'cool' in a black-metal-fan sort of way. Black metal fans often use it jokingly if they are talking about something that is far from extreme or cool in a black-metal-fan sort of way.
1# Immolating monks ist kreig.
2# Guy 1: what the fuck? Why did you buy a rabbit?
gUY 2: Snowy the Rabbit ist kreig.
"is lame". Popular within the geriatric community.
A play on the German "is krieg" a derivative of "war" which means "it's cool"; however the alternate spelling creates new meaning.
"We're having schnitzel again tonight? Ist kreig."