A scabby anus (ie. An anus and/or surrounding area that has been scabbed over.) It is most commonly recieved from being rubbed on the sidewalk, though a scaj can also be obtained from an STD or a rough night.

When used in referance to one's self, a scaj is just a synonym for butthole.

No Bull Shit, and old hacker acronym which is usually used to signify that the talk will be serious.

A scaj is a scabbed over anus and surrounding area.

It is obtained primarily from rubbing one's anus on the sidewalk, but can also be obtained in other ways such as a rough night or a dirty game of hide-and-seek.

When one refers to theirself, a scaj is a synonym for butthole.