PshhhFuck.
It really depends on what I’m trying to say… I try and suit my slang adjectives to the occasion, y’know.
But the generics include:
“off the hook”
“killer” (great minds, of course)
“immense”
“mindblowing”
“luscious” (if it’s funky)
“bootyriffic” (if it’s REALLY funky)
“saucy”
“uplifting”
“transcendent”
“angelic”
“trance-inducing”
“i have a boner” (er, wait… that’s not relevant here 
)
cari… it’s killer that we’re more alike than two people should be 
I probably say awesome about 90% of the time, but others include …one of the best I’ve ever seen, unbelievable, phenomenal, or the adverb adjective for effect; ridiculousy awesome, crazy good, etc.
this 
(<- not a “thumbs-guy”, a “pointing up” guy)
i refer to this as phish shock. (ie. man after portland i had the worst case of phish shock i’ve ever had)
wild man
My 2010 word of the year shall be:
thump - as in ‘damn that set was thumpin’ or ‘we’re gonna go back to the car and thump it up for a while before we leave’
Fantasmic…which is a premium blend of Fantastic & Orgasmic 
Oh yeah, I like that. I could see that catching on quickly.
Fire! or smoked as in “that maze smoked” when the jam builds and starts to get intense Ill say things are getting HOT! I also refer to an upcoming show that I predict to be extra good as a “Heater”= “2nd night alpines gonna be a heater” last summer when they went into super spacey jams with digital noises and that kill switch shit trey does 
, I would turn to my friend and say A–W—E---S----O—M---E in super slow motion very low voice