Danbooru's bastardized version of the term "curls". Means people [mostly female] with curly [usually ringlets] hair. Can be combined with twintails to get the twin drills style. The Japanese term for this type of hair style is 縦ロール (tate roll).
The following tags are aliased to this tag: drillhair and doriru (learn more).
The following tags implicate this tag: twin_drills, quad_drills, and side_drill (learn more).