(derogatory) wooden, as of a person's character or behavior / (derogatory) wooden, as of a person's mental abilities: blockheaded, stupid, dimwitted

tree / wood

tear up, tear to pieces / tear off, pluck

bite into/off

everything

(colloquial) current boyfriend

(slang) Alternative form of 彼氏 (kareshi, “boyfriend”)

everyone, one and all

a blade and saw / such weapons as used for punishment and torture in ancient China

circular saw