高卒こうそつ
kō sotsu

Noun
no-Adjective

1. having graduated from high school (as one's highest completed level of education); high school graduate

Colloquial
Abbreviation
ぼく高卒こうそつだからそのぶん高校こうこう問題もんだいとか出来できる。
bokudakasotsudakara sono bunkōkōno mondaitoka dekiru.
I'm a high school graduate so I am that much able to answer high school problems and such.