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.