you felt ___ crawling down your back

A line of flavor text when fighting Sans that might pop up, the protagonist is described as 'feeling their sins crawling down their back'.

Other words can be transplanted into it.
Undertale

You felt your sins crawling down your back (Original)
You felt a girl crawling down your back
you felt ___ crawling down your back

by Shalax August 24, 2016

backal

Of, or relating to, the back. Most commonly used as a reference to the presence of hair on the back. As in, "backal hair"

Eww look at all that backal hair on that dude.

by Jacaranda February 26, 2008

Step on a crack, break your mother's back

This is an old children's game, anyone who trod on the cracks between the paving stones was out, until only one player was left, he or she was then declared the winner.

Step on a crack, break your mother's back– Most of us know the old rhyme “Step on a crack, break your mother’s back.” Whether the rhyme is the cause of, or a result of, this superstition is uncertain, though belief in it persists in many people today, even if subconsciously. Come to think of it, avoiding sidewalk cracks is probably a good policy for anyone who wants to avoid tripping.

by WormBrian October 25, 2009

back door betty

A woman who likes to take it in the ass.

Mike's girlfriend is a back door betty.

by TAC April 28, 2003

back door action

butt fucking; ass wrangling; poopshoot pounding; cornholing; bunghole banging; fifth base; reaming the asshole; what your mama let me do to her last night; stiking it in the butt-hole; browning the man-sausage; sticking the hot dog in the bun; making a kielbasa sandwhich

by Anonymous June 10, 2003

Splash Back

When you take a big crap and you terd lands in such a way that the dirty toilet water splashes back up at your ass getting you all wet. Usually refered to when your launching Ass Rockets.

Skaz:Im gona go launch some Ass Rockets
Chubbs:Alright, have fun, and watch out for the splashback!

by Chubbs March 14, 2004

backas

When a male wants to have sexual intercourse with a women doggy-style. Usually if the women has a large or fat butt.

That girls ass is sexy! I want to put her in the backas!

by daroscade November 25, 2009