frontin', saying stuff that isnt true

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.

lyin or bullshit'n
the phrase "cappin" originated
in tx

to lie or bullshit

short form of "high cappin" which was used in the 80's to describe some one who lies about their social status or one who flaunt's arogantly brand new merchandise but is in debt. now-a-days its basically used to describe a liar but it still refers to he old meaning from time to time.

in cleveland, it means to show off or stunt a.k.a flossin