The effects of marijuana usage that remain for a time after the high has worn off, such as forgetfulness, lack of motivation, apathy, and general emotional fucked-uppedness.

Not noticed so much in occasional users, but very obvious in those who buy Zig-Zags by the case.
Herbal Alzheimer's looks like Tommy Chong at his peak before his first weed of the day.
by da Graybeard August 6, 2009
Get the herbal Alzheimer's mug.