A Hocho is a Japanese kitchen knife. Used for mincing food. You are belligerent or something is terrifying. Known idioms are e.g. "to get one's knife out" in disputes or "to stab someone in the back" in betrayal.
The kitchen knife emoji was introduced in 2010 and released as part of the Unicode 11.0 standard. This emoji can be found under the food and drink
category. Because the kitchen knife emoji has been around for quite some time, it should display correctly in the majority of operating systems.