I remember only a bit of the audio and the situation, as I was half asleep half awaken and its all fadey.

I think it was an animated serie (for some reason I think of south park) where the protagonists go to some planet and everything is called "Maglarp". Every alien is called "Maglarp" and every object is "Maglarp". There is a moment where the protagonists are with a military leader and ask how can they distinguish each other and know which one are refering every moment, and the military leader says its easy, and proceeds to say "Maglarp!" to the formation of soldiers and one in the middle of one row steps forward and says "I'm here sir!".

After that I remember my sister losing her shit with laughter and feeling very confused because my brain didn't process all that randomness, so I can't give any more details, and my sister doesn't even remember what I'm talking about.

Thanks for the help!