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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
eccy by wee boney October 26, 2013
Related Words
Dunloy slang for a retard
Are you an eccy?
Eccy by EccyDunloyLord March 9, 2023

eccy bum drop 

The act of placing an ecstacy tablet in the anal cavity and proceeding to drop to the floor with force as to make the tablet enter the anus. Guaranteed 15% extra buzz!
Done a pure eccy bum drop last night and was heavy off my tits man. WILD!!
eccy bum drop by ZEDMAN + JIEHAWK February 26, 2014

Eccy Cruncher 

Somebody who takes great delight in consuming ecstasy - which is sometimes shortened to "Eccy". Eccy Crunchers can usually be seen wandering around nightclubs with dilated pupils and eyes wide open. It is unlikely that an Eccy Cruncher would make in intellectual conversation
"See those boys over there? They're all eccy crunchers"
Eccy Cruncher by arms86 March 8, 2010

eccy jaw 

When your jaw goes all ways after taking ecstasy.
Vicky Pattison has an eccy jaw
eccy jaw by Smithtin March 8, 2016

Eccy Back 

When you take so much ecstasy you end up with a permanent hunch back, much like Quasimodo.
“That Craig guy has such an Eccy back.”
Eccy Back by Muzzering July 10, 2019