1) Aggressor 2) Assailant 3) Assaulter 4) Attacker 5) Basketball position 6) Basketball terminology 7) Broadsword man 8) Budget committee, these days 9) Cutting tool 10) Cutting weapon 11) Cutting-edge horror film 12) Freddy Krueger 13) Gory film figure 14) Gory movie category 15) Grotesque genre 16) Horror film figure 
[basketball] A slasher is a basketball player (typically a guard, but also possibly a forward) who primarily drives (slashes) to the basket when on offense. A slasher is a fast and athletic player, who is looking to get close to the basket for a layup, a dunk or to drop in a teardrop shot for a high-percentage two-point play (this style of ...[tool] A slasher is an implement with a long sharp blade used to clear scrub. Its long handle, and the open face of its blade, lends it to use for clearing thin and dense low-lying bush where an axe would be too clumsy. ...
• (n.) A machine for applying size to warp yarns.
Slash'er noun (Textile Manuf.) A machine for applying size to warp yarns. 
Slasher is slang for a violent man, particularly one who uses a knife.
surgeon 
[n] - a fighter who slashes
noun a weapon (a sword or dagger) used for slashing