自画自賛じがじさん Singing one’s own Praises

自画自賛じがじさん Singing One’s Own Praises

自画自賛じがじさんに聞きこえるかもしれませんが、ぼくは本当ほんとうに歌うたがうまいよ。
It may sound like I’m bragging, but I’m really good at singing.

に聞きこえる—sounds like… [太ふとって見みえる – to look (appear) fat]
かもしれません—may; might; possibly
が—but
ぼく—I (usually used with males)
本当ほんとうに—really; truly (adv)
歌うた—song [in this case singing in general]
うまい—good at; skillful; clever [can also be used with food or drink to mean ‘delicious’]