A hand gesture is a movement you make with your hand. Rude hand gestures include; sticking your middle finger up or your middle and index finger up. A friendly hand gesture is perhaps sticking your thumb up. Hand gestures cna be used to communicate - such as sign language - or it can be motions made with your hand when talking

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.

Signs done with one's hands used in place of or with words. Can be used in many situations or circumstances.