Common nomenclature for 3,4-Methylenedioxy-Amphetamine. Related to MDMA (Ecstasy) but different, at least effects-wise. Basically it's like rolling but much less tactile (usually no full body orgasms like X), and less empathetic and lovey-dovey. On the other hand, it gives a powerful feeling of euphoria and bliss, gives you some crazy visuals, and enhances music to an INSANE degree. The music enhancement is the reason that some DJs prefer it to MDMA. Most often found in commercial ecstasy pills, passed off as MDMA. Occasionally some lone-wolf chemist will make a bunch for themselves and their friends.
by Buddha420 November 13, 2005
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MDA stands for Muff Divers Association. They were a group of bad-ass fuckers from Upstate New York in the 1980"s. Also known as the "MDA Hardcore Unit" . Leader was Rudy, a legendary mutha who would host epic parties. The membership were all best friends who would party hard, but always had each other's back. RIP Rudy! No Muff Too Tough, We Dive At Five!
When is the next MDA party?
by Hardcore Unit June 12, 2014
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Myspace display of affection. When one flaunts their lover all over their myspace. The word usually denotes clinginess (as does PDA). Signs that you have too much MDA:
1.) Your headline has their name and/or date.
2.) You have one or more pictures of just them, from his/her myspace, not taken with/by you.
3.) You say something universal and cliche like "I love him so much, he's my world, he's always there for me, I can't live without him.
4.) You have more pictures of you too than pictures of just you or you with other friends.
Me: Holy crap, they've only been dating for 3 hours and Brad's number 1 on Sam's top 8, even before Sam's sister Beth!
Random bystander: Definitely a case of MDA.
by Katieemcee November 23, 2007
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stands for

Display of

used when a person leaves an affectionate comment on myspace
"aww ur so sweet, isnt myspace awesome?"
by Drewsta July 27, 2005
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Stands for Mysterious Drinking Accidents, occuring after a heavy night of irresponsible drinking. One awakens the next day to find bruises, scrapes, cuts, etc. and NO recollection of how they got there.
"I have this huge bruise on my arm, but I have no idea where it came from. Must be an MDA from last nite."
by Chrissy0913 December 5, 2005
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The MDA is a group of people called the Modern Day Angels.

They consist of six males and one female.
Four out of six are of angelic specimen. Meaning, they are in fact angels.
The other two are demons, but are harmless to the angels and human female.

Their names are as followed:
Jamie Welkmire - Angel
Rami Fukunaga - Angel
Eli Bax - Demon
Physc Kim - Angel
X Yut-Lung - Angel
Choi Welkmire - Demon
Yumeco Yumeni - Human
Did you see that article about the MDA last night?
by T H I C C ass oof June 29, 2019
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I gun nut who stalks the Facebook pages of the local Moms Demand Action group and follows them to where they are having lunch. Sometimes by himself or if time permits, he will organize friends to join him. This stalker also practices open carry and comes armed with a gun claiming he is defending his 2nd amendment rights. The sad reality is, he's a stalker who is trying to intimidate.
Ex: Kory checked his local MDA Facebook page everyday until finally one mentioned meeting for lunch the next week. Quickly, he sent out the alarm to the other MDA stalkers to unite!
by kissmygrits December 16, 2013
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