Sumo Wrestler
noun
A power samurai isn't a samurai at all. A Samurai's all about precision, after all. So, imagine someone that's a huge mass of muscle (and fat). This Japanese warrior is all about power... ramming into people as hard as they can to knock them over. This person is a sumo wrestler.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
私の彼氏は力士です。
My boyfriend is a sumo wrestler.
あそこにいる力士、有名な人だよね？名前なんだっけ？
The sumo wrestler over there, he's a famous one, right? What's his name again?
大好きな力士からサインをもらいました。
I got an autograph from my favorite sumo wrestler.