Weeb trash is a term often used in the anime community which refers to the dreaded weeaboo. Respectable fans of anime often use it jokingly to refer to themselves and their interest in anime and manga.
I'm actually thinking of traveling to Japan. I know, I'm such pathetic weebtrash.
Someone who pretends to be a weeb because of the recent trend of anime being "cool", they usually call themselves an "anime fan" but have only watched 1-2 episodes of Naruto/DBZ/Any other overrated anime.
Person who's never watched anime in their life: Yeaah bro I like anime ya mean Naruto right??
Person 2: Fucking fake weebs