It's supposed to mean that pot smoking will eventually fail to satisfy, and you'll move on to harder drugs like heroin and cocaine.
Cannabis
I don't believe cannabis IS considered a deadly drug.
a herbal drug ?
Depends, better for you would be cannabis because it is considered a soft drug, but if you mean more fun then LSD is much cooler
No. Cannabis is only harmful to individual if you consider yourself as a hardcore pot smoker. Other than that, it's medicinal.
"Cob" is a slang term that refers to a type of cannabis concentrate called "cannabis oil blend." It is a mixture of different cannabis oils or concentrates that is often used for vaping or dabbing.
a drug test
4:20 or 4/20 (pronounced four-twenty) refers to consumption of cannabis and, by extension, a way to identify oneself with cannabis drug subculture.
Cannabis itself (weed) would be the drug technically but THC and several other cannabinoids are the chemicals produced by the cannabis plant that "get you high".
Any drug made from the hemp plant, (genus cannabis). Sage.
The drug is spelled marijuana (Cannabis sativa).
cannabis, LSD, shrooms (most hallucinates except PCP), or caffine