Here's some slang I've heard, from time spent in the northwest, northern and southern california (Most of the time I think slang is pretty dumb, so i don't really use much):
"grubbin"-looking for and eating food (ie you've got the munchies)-I hate this slang word!!!
"lighter game" - the phenomena of losing and gaining lighters when smoking in a large group(this always happens to me!).
"Blaze"-smoke
"Blazed/Blitzed/baked"-high
"Header"-bowl for one person, usually big enough to get you pretty high
"Thumber"-large bowl that is overflowing(used your thumb to push it in)
"Snapper/Popper"-tiny single-hit bowls-usually two people who just want to smoke their own weed but do it together with one peice do this
"bomb"-mentioned previously i think, = good, as in "I just got some bomb-ass buds from my buddie"
"Chron"-weed
"burn one down" - smoke a joint/blunt
"camping"-getting too stoned to remember to smoke and pass the bowl on in a group and just zone out or talk forever (see also "the bong is not a microphone!!!")
"cashed"-the bowl is smoked to completion(usually you warn the next smoker if the bowl is about cashed because it'll taste crappy)
"killed/dead/toasted"-same as cashed
as well as some of the slang words mentioned previously
Slang I've heard the baby boomer generation use (ie my parents)
"loaded"-high
"ripped"-high
"dope"-weed