MST

noun2

1. •
   (slang) A parody fanfic created in this manner.

   • The commentary in the MSTs may have been nasty and uncalled for; but it was not plagiarism. — 1999
2. •
   Initialism of minimum spanning tree.

verb1

1. •
   (slang, old-fashioned) To mock a work (typically a fanfic) by inserting satirical commentary.

   • But you can't quote large chunks, and MSTing a story would seem to me to be across the line into infringement. — 1998

noun1

1. •
   Abbreviation of Master of Studies.

noun1

1. •
   Mosammat