n. 1. Another name for "unibrow",
2. A term used for describing an eyebrow line that has no definition of duplicity, very well looking just like a typical mustache (i.e.: one solid eyebrow from temple to temple, for some misfortunate humans)
May also be used as a verb, as in: growing an eyestache; eyestaching
Any and all future use of the term "eyestache" for advertising, marketing or profiting shall solely be.the property of A____ M______ R_____, as noted by legal trademark of the name Eyestache™.
"That eyestache could use a bit of a trim before he gets poked in the eye by a rogue hair"