"Yuki! Watch the paint!"
Thus, "uchi no utouto maji de dekain 25" becomes a generational lament: "My sleepy self at 25 years old is overwhelmingly massive (in fatigue)." uchi no utouto maji de dekain 25
"Uchi no Utouto Maji de Dekain" seems to be a mix of Japanese words and could be related to a manga or anime series. Without more details, let's consider a general approach to what this could entail: Uchi no Utouto Maji de Dekain 25: Decoding