A weeb who is too sensitive towards various jokes about his/her/they's favorite anime/anime's that is liked by them. They can't handle sexual jokes, jokes about certain characters, dark jokes from certain animes, etc. They also think cosplaying as minors and lewding those characters is considered pedophilia, even though it's just a drawing. Many of them influence bullying towards other cosplayers, shippers, or NSFW artist and suicidal thoughts towards those people. Their entire world revolves around their OTP's and cute fluffy animals. They are usually weeb teens or single 20 or 30 year old's with many 'wives' 'husbands' and 'children' in their friends group. If you happen to come across a Marshmellow Weeb, run as fast as you can. Their drama will make your brain hurt
Marshmellow weebs will cry over anything they don't agree with.

Cosplayer: do you think this would look sexy in bakugou cosplay?
Marshmellow weeb: Ew! ArE YoU A PeDoPhIlia?!

Cosplayer: What? No. are you a Marshmellow weeb who needs to be roasted?
by Panda O'zilla July 6, 2020
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