(No helping them girls)
It is stuff you put on your eyelashes to make them longer and look fuller. It's typically black but can be many colors.
Most Helpful Guy
For your lashes, and some guys use it too! Then the liner pen for the base of the lashes and the edge of the lid where it meets the eyeball, a little shadow on the lid and you ready to go on the prowl hehe it works on some girls too, as without it some look like there eyes are dead but then suddenly come to life with a bit of slap on.