The line along one's forehead where hair starts growing.
A fishing line made from hair.
A very thin line in writing, drawing, or typography.
A very thin fissure.
very thin, as thin as a hair
Oral stimulation of the male member, a blowjob (more commonly top).
The very topmost point.
The highest or utmost degree; the best of anything.
Excellently; in a first-rate manner.