That part of the beard which grows upon the sides of the face, usually of the male, or upon the chin, or upon both.
2003, Hanne Blank, Unruly Appetites: Erotic Stories He licked my ass cheek, then rubbed his face across my butt. I winced as his two-day whiskers rubbed the welts but said nothing. Then he growled and I felt his teeth digging into me, crushing, tearing, sinking deep and tight into my battered, stinging ass at the same time that he shoved three fingers deep into my cunt.''
One of the long, projecting hairs growing at the sides of the mouth of a cat, or other animal.
(colloquial) The (very small) distance between two things
It missed falling on your foot by a whisker.
2011, May 14, Peter Scrivener, Sunderland 1 - 3 Wolverhampton, Boosted by their reward, Wolves continued to push forward and Jamie O'Hara came within a whisker of doubling the lead, smashing a 25-yard effort on to the bar.