Top definition
When someone has a very big Jawline leading up to their forehead, Racists usually think only black people have jawbacks, but anyone can have them.

They dont always show on people because they have hair covering the jawback or the fringe.

If someone has a jawback they will have a massive forehead that looks like a giant bump on their head, Eg. Sakura from naruto.
Person 1: Wow you got sum big up jawback bruv
Person 2: You can see it? I need longer hair.
by HOO SHAA! July 23, 2008
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