When a person leans their back against a wall, usually outside, and defecates.

The horror and shame of getting old; especially when approaching the age of gray hair and arthritis.

A longish extrusion of fecal material stuck to the skin of the left or right ass-cheek, that is free enough to lean to the right or left, front or back, depending on the angle of the bum relative to the toilet seat. May or may not be fully extruded from the balloon knot, but must be attached to the cheek in question. May be partially submerged in the toilet water, if long enough. Requires a vigorous shaking of the butt cheeks and possible sphincter contraction to dislodge, followed by extensive butt-wiping to ensure proper hygiene.

when a guy is taking a pee and has to use the wall to hold himself up from the great feeling

A person who leans over the table while shooting in a game of beerpong.

A line of coke.

You know, you gotta lean over to get at it.

When someone leans a trash can of water against an inward swinging door so that when the occupant opens the door the water splashes into the room soaking it.