mystery plug

The act of "accidentally" slipping an ecstasy, or thizz pill onto one's ass during anal sex. One would place a thizz pill against the receiver's asshole without the other knowing, then immediately after- shove his dick, or finger, in this persons anus hole. This requires precision and a loose ass, or a lot of lube. Can be used on a guy or a girl, or a cat. Whatever you like to fuck will be surpised when the sex feels better than middlefuck's tongue in ur ass.

I'm gunna pull a mystery plug on Mario because I want him to let me rail his bungsnacks all night.

Flip is thizzin because I mystery plugged his asshole.

mystery plug by Kevin Middleton February 21, 2008

Myster-E-pluG 

The intense mission of doing a female in her rear end and then pulling out, placing some ecstacy on her asshole, and then pushing it in with your penis during reinsurtion. Mystery plug!

Robert pulled a Myster-E-Plug on his girlfriend during anal sex and minutes later laughed as she tried to figure out why she felt as good as she did!

Myster-E-pluG by Brotha Flip September 8, 2007