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4.
Shitty weed that is watered down and you need like an 8th just to get high. It is very common in the Mexican culture mostly the illegal ones because it is cheap and easy to get. Another name for 30's is 40's which is even worse because its more watered down and sometimes 30's/40's is mixed with oregano because dealers who sell 30's/40's are trying to rip you off because they think your a cheap Mexican who just wants to get high. 30's is shwag weed.
Stoner 1: Yo! I bought some 30's from my dealer, that shit was hella cheap like 10 bucks a gram!
Stoner 2: We gonna get fuckin' ripped tonight! That looks like some dank ass nugs!
Stoner 3: Uhh..you guys are stupid 30's is shitty and it doesnt get you high.
Stoner 1: For real! Man this sucks! Fuckin' Mexican dealer ripped me off!
Stoner 2: Yeah that illegal immigrant trying to sell people shit weed, fuck him!
by dankmofugga! June 10, 2009
17 70
 
1.
Slang for the perscription drugs Percocet or Percodan, which is an opiate or painkiller, commonly used recreationally for its euphoric effect. 30's are specifically Percocet 30 mg.

Ironically, Percocet is an opiate, which is a nervous system depressant, and the slang term perc cannot be verbally distinguished from perk, which means to make more alert or active.
Steve almost burned down the house because his dad wouldn't give him money for 30's!
by STEVE VB February 03, 2012
71 39
 
2.
Wheels consisting on 30 inches, only rappers and drug dealers can afford these rims.
1)"Ridin' 30's on the hummer, '07 is the yearr" -Project Pat
by -j.o.e- November 15, 2007
27 59
 
3.
Another term for bud.. like regs
shitty weed
10$ a gram
dude1: shiett, I don't have enough money for dank.
dude2: well then lets jus get 30's.
by buddagirl420 December 30, 2007
37 71
 
5.
gay ass era in which nothing happened
your dad is from the 30's
by manny m (napster November 02, 2003
30 110