Concave

[Sarah]

When a girl or guy has a part of their body like their stomach or love handles that curve out excesively. Most likely not to descirbe a nice ass or big tits.

[Merna]

Having an outline or surface that curves inwards like the interior of a circle or sphere.

[Zipporah Schumaker]

Concave in Surfing. A concave bottom contour.

[Dianne]

When someones head is concaved inwards like a [brainlet] or as if you dont have [a brain]. Used to [diss] someone for being a retard or as a threat.