Short form for ecstasy. Ecstasy refers to MDMA, however most modern day ecstasy is just MDA or MDEA. MDMA is a party drug used by some who attend raves, clubs, concerts, spiritual sessions, etc. MDMA is not very physically addicting, however it depletes seritonin at a rapid rate which causes the high. This causes the user to feel depressed for a period of time after taking the drug. Heavy abuse of the drug has been proven to cause permanent brain damage (not government endorsed). Brain damage may be avoided by moderation and the use of seritonin building supplments such as 5HTP. MDMA was found to have very positive psychological qualities during medical testing but the fact it could be abused is what caused it to be banned.
Jimjim was arrested for having E when the pigs raided.
In MandarinChinese, the number 8 is prounounced "ba" and the number 1 is pronounced "yi". Put them together and you get "ba-ba-yi" which when spoken fast sounds a bit like "ba-bye" which sounds like the english "bye-bye". Possibily originated from Taiwan, Singapore, or China.
I wonder where these other entries came up with their crap. You all just got schooled.