A cold blooded killer with a fucked up sense of humor. They're not only fearless but fight with a grin on their face
A sadist kills for fun, a mercenary kills for money, but an infantryman, he kills for both.
Getting brutally rejected in a harsh way, usually causing an Oof type reaction.
Johnny texted Sally "Hey girl" Sally responded "Bye boy" then blocked him.
Johnny done got Oof'd