'purp', lol. Kinda like noobs calling stuff 'dro' like it's a strain... lots of the purple strains are weak and lame!
I like S.A.G.E. the best. It's strong and actually tastes like... OMG!!!!...cannabis!!
I got some MTF-derived seeds recently. I've been under the impression that 'real' Thunderfuck is a chocolate taste. And you can't get the real thing in seed form, just crosses of it. Like MAtanuska Tundra, and a strain from Reeferman, Kodiak Gold.