I heard a new one the other day, had a few mates round at my place, vegging out and hitting a few bongs, when one of em asked me (I am unsure of the spelling, and most likely, so too, are they

)
'whats 'guanin'
Pronounced 'gwah-nine'
I was tempted to say something along the lines of 'its a purine base, that along with adenine, cytosine and thymine, which make up DNA and which forms explosive salts with perchloric and nitric acids'
I almost let that out, but realised it would have sailed straight overhead in the company I was keeping at the time
Another one I heard, that I admit I have caught myself using, although I don't mind it too much, is 'skaboot' as in 'Is gotta skaboot, 5-0 are on the way'
Variation of 'WTF' used round here, rarely, is 'whiskey-tango-foxtrot?'
Amusingly used to enquire/complain at the same time in the prescence of bacon.