Track Marks Edit Meaning

1.

the line of bruised needle holes in the arm of a junky produced as he shoots up at a slightly higher point on his arm each time.

she never wears short sleeves because she doesn't want anyone to see her track marks

2.

Strips of brownish discoloration that can often be found in the undergarments being worn by someone with a 'less-than-tidy' anus.

Damn it all. I just bought these briefs last week and they are already trashed with track marks.