A term used to refer to the video game Mass Effect, a sci-fi role playing game from developer Bioware for the Xbox 360 released on November 20th, 2007.

Originally used to communicate an individual's excitement of the game prior to its release. The game also allows the user, who plays as Commander Shepherd - to have sexual relationships with some of his or her shipmates which lends itself to the sexual reference and the ease with which "effect" can be changed to "erect"
Forumposterguy #1: "Oh snap, new Mass Effect trailer is up!."
Forumdood #2: "/checks pants. Yep, I'm Mass Erect"
by kirbybreezy December 2, 2007
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1. When someone gets a super stiff boner from playing Mass Effect 1, 2, or 3 and/or looking at one of the many female characters or their respective sex sences.

2. A person who gets a hard-on from playing any of the Mass Effect games.
man looking at Liara's ass give me such a mass erection
by drity_d June 11, 2012
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When someone sends a NSFW message in a group chat, it causes "mass erections". It's basically a lot of people getting erections at the same time due to the NSFW message/post.
-Chat admin: NSFW materials are prohibited in this chat, please refrain from sending media that will cause mass erection in members.
by Hadi Poker Face August 12, 2017
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It's what you get when you play Mass Effect 2
"I just finished my 5th playthrough as a vanguard on insanity! I have a major Mass Erect 2!"
by DAT THANE March 5, 2010
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