The Laserhawk is a term that Lasercorn dubbed in the Smosh Games VS episode "Laserhawk Is My Death Blow." In it Sohinki starts humming the Ultimate Assassin's Creed 3 song from Smosh while throwing a tomahawk at somebody and then Lasercorn throws a Tomahawk at somebody and calls himself The Laserhawk. (Unicorn that shoots lasers and tomahawks. We dont really know to be exact.)
More recently it has become the name of his latest drastic hair change, similar to the jovenhawk.