cerealkiller

noun
a gamer who frags his/her opponents repeatedly in a intense and quick fashion, usually surviving an onslaught of multiple enemies at once.

origins: Derived from the word serialkiller, exchanging "serial" to "cereal" denotes that the player is "having his opponents for breakfast," a phrase which implies a harsh killing done on his/her enemies.

Thomas is a real cerealkiller, he played against the odds on a five versus one match and won!