Initialism of Mountain Standard Time.

(graph theory) Initialism of minimum spanning tree.

(fandom slang) To mock a work (typically a fanfic) by inserting satirical commentary.

(fandom slang) A parody fanfic created in this manner.

Mosammat

Third-person singular simple present indicative form of MST

Initialism of Multiple Spanning Tree IDentifier. / Initialism of medium-scale traveling ionospheric disturbances.

a town in the Mahiloŭ Province of Belarus

simple past tense and past participle of MST

(fandom slang) A parody fanfic created by inserting satirical commentary into an existing work.