The reading 乜 is used in 乜斜 — to squint or look sideways with eyes narrowed to slits (often a tipsy or disdainful look). A separate reading niè is the surname Nie.
Components
ideograph
乜miē
to squint
A two-stroke unitary graph not analyzable into independent parts — a single curved sweep plus a hook. Indexed under Kangxi #5 乙 (the 'second / bending' radical) by tradition, since the curving stroke matches that radical group.
Filed under radical 乙 (yǐ, #5) by convention. 乙 is not a separate component in 乜, so no strokes are highlighted.