烏帽子: a type of court cap in the Heian period, now worn by gyoji presiding over sumo matches

牡蠣: oyster; roasted and powdered oyster shell, used in antacids, sedatives, and as a bird feed additive

carving in fine lines

坪井, 壺井, 壷井: a surname

(slang) right up one's alley; in line with one's taste

flathead mullet, Mugil cephalus

(slang) to overcharge

(more polite) Alternative form of おぼっちゃん (obotchan)

(polite) (someone else's) son

(slang) to find something utterly hilarious