Seems like the JP text involves a bit of grammatical wordplay. I've done a translation that attempts to preserve the original joke.
Is something the matter, Clownpiece?Looks like she's down because the terrestrials called her "weird T-shirt girl". So saying "weird T-shirt" is out, okay?Got it!Weird T-shirt...Yeah!! Weird T-shirt's out!!Saying "Weird T-shirt" is out, saying "Weird T-shirt" is out, saying "Weird T-shirt" is out, saying "Weird T-shirt" is out, saying "Weird T-shirt" is out...?
Master? What's wrong?