When you find a definition on Urban Dictionary that you've never heard of but you think other people might have heard of it, so you just click this. (NOTE: Never click this when you see a definition that is a name, e.g. Michael)

From STEM, an abbreviation short for "Science, Technology, Engineering and Mathematics", a STEMlord is a pejorative term for a particular kind of person who has studied in these areas at university or works in these fields who holds a pretentious, condescending attitude to anyone who has studied in any other fields, particularly the Arts and Humanities. They typically believe themselves to be more "intelligent" and "rational", while generally remaining incredibly ignorant outside of their areas of expertise and having the charisma of a rotting pig's backside.

The button u might press when u vote for:
president
flavor of donuts
if this should be a definition