pronoun
A childish, cute, or playful first-person pronoun used mainly by young boys or in a self-infantilizing, humorous way. Not used in formal or polite contexts.
僕ちん、今日はお菓子をいっぱい食べたいな。
I wanna eat lots of sweets today!
「僕ちんも一緒に行く！」と弟が言った。
My little brother said, 'I'm coming too!'
More assertive, masculine first-person pronoun; lacks the playful, childish tone of 僕ちん.
Formed by attaching the diminutive suffix ちん to the first-person pronoun 僕 (ぼく). The suffix ちん is a variant of ちゃん, used to create cute or childish forms.