The Charger is a Special Infected that appears in Left 4 Dead 2. The Charger's main attack is charging forward and plowing into the Survivors, hence the name. On a successful charge, he will grab and carry a single Survivor away while knocking down the others. Once the Charger has hit a wall or other surface, or after he has run a certain distance, he will begin slamming his captive into the surrounding earth until an ally frees them. If he misses and hits a wall, he will stumble, leaving him open to attack.
The Charger can be detected by the Survivors by the warped growling noise he makes. He will announce his charge with a loud bellow. The Charger appears to have a rocky or calloused surface on his larger right arm, which is what he uses to inflict most of his force when charging, while his other arm appears to have no bones or muscle, flopping around uselessly.
Because of his hulking size, the Charger cannot be shoved off with melee, and must be killed in order to release his victim. If a Survivor has explosive rounds, they will dislodge the Charger from the Survivor and cause him to stumble. Any Survivor that has been knocked out of the way during his charge will fly a considerable distance and slowly stand back up, making the Charger a deadly foe in cramped hallways or near high passageways. He is also the strongest and most durable of the Special Infected (excluding the Tank and the Witch); additionally, his melee attacks are very strong and can easily incapacitate a weakened Survivor.
Apparently people and the infected too like to make masturbation jokes about his big arm which he highly gets offended by ofc