Short for That's What She Said Stories, also known for a popular site where people can post their That's What She Said moments
TWSS Stories: I was in biology class and we had to make pie charts of our data, including a sliver of a section that was .25%. one girl got really frustrated and said "it's sooo hard! I can't fit it in, it's just too small." Our bio teacher, seeing that she was in distress, proceeded to say "wait, I'm coming!" TWSS!
TWSS Stories: I was taking an essay test when a girl raised her hand and half-jokingly said "Can we finish this orally, my hand is starting to hurt." TWSS!