Yours, Etc.: Origins and Uses of 8 Sign-Offs
a marijuana cigarette
a common person, esp. one who is ignorant or has no skills
There are muggles in every computer class.
a person without magical powers
1996; popularized by J. K. Rowling in "Harry Potter and the Philospher's Stone"
"marijuana, a joint," 1926, apparently originally a New Orleans word, of unknown origin.