It's a violent kanji, so we can think of the hand as a fist. So :
The business of BOKU no fist is eradicating posers.
eradicate (a pest or disease) 'The new task force will eradicate drugs once and for all!'
Sumo. I've seen a bunch of of straight porn featuring 'sexy sumo wrestler girls,' but I've been unable to find a single gay sumo porn. Which either means, a) gay dudes think sumo are trolls, b) gay dudes have too much respect for the manliness of Sumo to do a x-rated parody, or c) gay dudes just jerk it to regular sumo on the tube for free.
|僕||me (for dudes)||PERSON||人|
Me is a PERSON, who is eradicating you with my HAND.
壊す 壊れる 砕く 破壊 滅ぼす つぶす 撲滅 破る 割る 割く 裂く