GAPPU-RI がっぷり
Meanings
A state in which large, heavy objects are securely assembled so that they do not come apart.
Examples
・Take that job seriously and work hard.
その仕事、真剣にがっぷり（四つで）取り組んで。
↓Gappuri Yotsu
Dogmatic Opinion
“Gappiri-yotsu” is a sumo match in which two wrestlers pull their mawashi (belt) around each other and meet chest to chest.
To tackle things, etc. head on.
The way they bite and do not let go is also sometimes expressed as “Gappuri”.
