noun:

• son (of others); boy; young master - honorific language
• green young man from a well-to-do family; young man innocent of the ways of the world

noun:

• son (of others); boy; young master - honorific language ➜ 坊ちゃん【ぼっちゃん】
• green young man from a well-to-do family; young man innocent of the ways of the world ➜ 坊ちゃん【ぼっちゃん】

noun:

• elder brother; one's senior - colloquialism - familiar language ➜ 兄貴
• dashing young man; gallant young lad

noun:

• son (of others); boy; young master - honorific language
• green young man from a well-to-do family; young man innocent of the ways of the world

adverb / ~と adverb:

• fiercely (e.g. of a fire burning) - onomatopoeia
• bong-bong (of clock ringing) - onomatopoeia
• with repeated bangs (e.g. of fire cracker) - onomatopoeia

noun:

• striking clock - abbreviation - onomatopoeia ➜ ぼんぼん時計
• green young man from a well-to-do family - Kansai dialect

noun:

• young woman who acts like an old man - slang