《dumb dumb》的歌詞全文如下：
Verse 1：
Dumb dumb, dumb dumb
I'm feeling so alone
Dumb dumb, dumb dumb
I'm feeling like a clown
Chorus：
My life is like a movie with no ending
My heart is like a dictionary, it's always ringing
Verse 2：
I can't seem to get over you
You know that I'm still holding on to you
But now it's just a memory that's gone away
Chorus：
My life is like a movie with no ending
My heart is like a dictionary, it's always ringing
Bridge：
I'm trying to be strong but I'm feeling so weak
I'm trying to move on but I keep looking back
Chorus：
It's been so long since I felt something so real
It's been so long since I found something that real
Outro：
Dumb dumb, dumb dumb （repeat）
該歌詞來自於一個台灣組合的歌曲，歌曲名稱與歌詞不完全一致，根據所提供的信息，這是一首關於失戀的傷感歌曲。歌詞中的“dumb dumb”是一種俚語表達，指的是某人行為舉止遲鈍、笨拙或者表現得很傻。此外，這首歌中還有關於生活和愛情方面的描述，表達了失戀後的一種傷感和失落感。