When you jerk off into a condom filling it with your man chowder, making it similar to a water ballon, except it is sans water.

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.

when one fills balloons with the man juice then proceeds to throw them in the air and allow them to break over one's face.

When someone gets filled up with so much cum they turn into a balloon