A person that uses the perk Juggernaut in Call of Duty 4. It provides them with extra health. A shot from the most powerful weapons will not kill them.

The horrible moment when you realise that you have accidentally done something very slightly wrong which has very bad (usually embarassing) implications for you. This is typically the moment of realisation that you just sent a dirty text message to a close member of family, typically your mother, rather than the intended recipient.