A slang term for a hardcore porno movie. Derived from the Roman numeral that stands for the rating (XXX).
I was watching a thirty when my dad walked into my room.
by J T Dollar Sign September 26, 2003
A thirty pack of beers (thirty rack).
A thirty of natty light's only around $15.
by gus December 26, 2004
Marijuana that is not of supreme quality. Not completely shitty like shwag, but definetely takes alot to get you high. Often has many seeds and stems in it.
I'm not going to waste my money on that thirties - it will take four bowls to get me high. Stick with the flame.
by soff-bomb September 29, 2006
Week or nasty weed. Comes from 30$ of an 1/8oz.
i coulnd't get that good shit, so smoke these thirtys
by duse February 28, 2005