also: おおてんぐ
noun
large tengu; powerful tengu
Refers to a high-ranking or physically large tengu in Japanese folklore, often depicted as a more formidable version of the mythical creature.
See also: 天狗
この山には大天狗が住んでいると言われている。
It is said that a large tengu lives on this mountain.
noun
Idiomatic use; likens a boastful person to a powerful tengu, emphasizing arrogance or excessive pride.
See also: 天狗
彼はいつも自分の話ばかりする大天狗だ。
He's always a big braggart who only talks about himself.
天狗 is the general term for the mythical creature; 大天狗 specifically denotes a larger or more powerful tengu, or metaphorically a greater braggart.
Compound of 大 (large) and 天狗 (tengu, a mythical creature). The idiomatic sense derives from the tengu's association with arrogance.