An “Army Karen” is the wife of someone who’s enlisted in the military who is a total bitch to everyone else while he’s on deployment or just in the reserves
Sid: Susan is a total “Army Karen” since her husband was deployed.
Randy: yeah but she constantly uses her husband’s benefits at CVS pharmacy for birth control pills and even got an IUD on his dime while he’s been away.
“Army Karen” is a woman who’s boyfriend or significant other serves in the military and as a result goes on a power trip in acting erratically in ways not limited to infidelity to general human garbage behavior
Susan really has become an Army Karen ever since her husband was deployed.