1 definition by Halffunny:)
to give someone 'the eyebrow' is to raise ones eyebrows at the recipient then flick their gaze back and forth from the recipient towards another person in a suggestive manner.
Looking at your friend then giving them the eyebrow to the guy/girl he/she fancies or is fancied by.
by Halffunny:) January 23, 2012