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1.
1.Tablets of the popular party drug 'ecstasy'
2.Americans call it ex
3.MDMA
that raver's trippin on eccies
by S@m November 11, 2004
 
2.
short for ecstasy
"take some eccy, it'll be madcore"
by Alec D June 28, 2009
 
3.
Slang term for MDMA (3,4-methylenedioxy-N-methylamphetamine) which causes users to drink water, touch themselves and dance like a prick. You can tell someone has ingested such substance by the pupils looking like big black plates , they look as though they are trying to eat their face and they are excessively sweating like a rapist in a brothel. The term "eccy" is more commonly used in Scotland and northern parts of Britain.
"I just gubbed an eccy and I'm heading to The Arches" said a very out it Glaswegian 20 year old
by wee boney October 25, 2013