convex

On-Yomi: トツ — Kun-Yomi: でこ

Koohii stories:

1) [rakutenka] 30-6-2007(108): When I get vexed, I give people the middle finger.

2) [xiteru] 9-10-2007(63): Convex has a convex shape.

3) [wholefnfro] 1-4-2008(33): Sex makes me convex.

4) [taikura] 11-11-2008(18): Men are convex; women are complex.

5) [akaiYaMa] 12-1-2009(11): Japanese Idol's make my pants convex.