Originating from the name of Hormel's canned meat, spam is junk mail on the Internet. The most common form of spamming (yes, it can be used as a verb too) is through e-mail, like those dang forwards people you hardly know send you. Spam can also be annoying postings to a newsgroup or bulletin board. Spamming other people is definitely not cool and is one of the most notorious violations of Internet etiquette (or "netiquette"). So next time you just have to let everybody know about that hot new guaranteed way to make money on the Internet, think before you send it, is it really worth it?
SPAM
Meaning of SPAM in English
English glossary of computer and Internet terms. Английский глоссарий компьютерных и Интернет терминов. 2012