In the game Rainbow Six Siege a player (defender) partially breaks open a window or door to get a cheap shot at the enemies. Usually these people are Jäger or Bandt but all players can do this
Attacker: THE FUCKING LITTLE SPAWN PEEKING JÄGER IS SITTING IN THE WINDOW WAITING FOR US TO FEED HIM HIS LITTLE ACE
Jäger: lol rektez
In the CSGO community, the term "Ferrari Peek" has been created to indicate a type of kill/peek.
A "Ferrari Peek" is when someone swings you around a corner and kills you before you even get a chance to react.
Ferrari Peeks can sometimes happen just out of luck or if you are that good, just raw skill.
Meaning - To get absolutely fucked around a corner and contemplate your reasoning for playing this shit game.
"This cheating cunt just Ferrari Peeked me upper B."
or
"I literally just raped this guy's whole family with a Ferrari Peek."