Country Dictionary

judging by 13 of the top 20 definitions, it's a way to describe someone's eyebrows

OMG Abraham Lincoln's eyebrows are on fleek!

When something is perfect, or going right, or on point

Person 1: Wow, look at Lee Pace's eyebrows! Person 2: Eyebrows on fleek.

Flawless Letting Everyone Else Know

You are fleek with them eyebrows girl

lookin good originaly used to represent good shaped eyebrows

girl yo eyebrows is on fleek

v. to sing the song of one's people in a traditional manner, usually while dressed in ancient garments.

You have never heard the national anthem of Estonia? Then allow me to fleek.

smooth, nice, sweet

"That was a fleek move you pulled on that chic."

on point

"He fleek as fuck" -Plato