in anal sex, this is the deeper part of the rectum where the colon begins. There is a muscle there that like the rectum has to 'open up' and for men who are endowed enough to reach it, feels like hitting 'the second hole' inside the first one.

A term often used by gay men
Let me open up that second hole with this nine.

That nigga with the big dick got all up in the second hole!
by BlkChicago79 March 31, 2006
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when partaking in anal sex (partically gay sex), the penis reaches through the inner rectum, known as the second hole. when this occurs, the bottom feels hightened pleasure.
that dick was so big, it hit so deep. got me feeling that second hole bliss.
by akrsyne June 2, 2022
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that'd be your VAGINA
Its like some small animal crawled up the second hole from the back of your neck and died, look at all the fuckin blood.
by the real LaURINE July 30, 2006
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Invented by Thomas Jefferson in 1796, the Second Butt Hole is an additional anus created in order to alternate pooping. While maximizing efficiency, the Second Butt Hole also provides relief to the primary butt hole, so that you don't get sore from all that pooping.

The Second Butt Hole is most famous from its appearance in the film Titanic. Ben Stiller has also reported being an avid fan of the Second Butt Hole.
"Man I was so wasted last night, I was shitting all morning. Thank God I have the Second Butt Hole"
by Minerva McGonagall May 11, 2009
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