To filch is when a man eyaculates inside someones anus (usually another man), then he sucks the cum out with a straw like object. The filcher is the one who eyaculates. The filchee is the receptor of the cum. Filching is the act of filching. Filched is the usual past tense of the verb.
Filch is a Medeivil Curse-Word used to Address The Act of Thievery,
the harshness is essentially = to the F-Word the implication of being called a Filcher was = to being called a Waste of space on This earth but obviously shorter and MUCH More Harsh...
Imagine if the F-Word Meant You Don't Deserve to Live when used to refer to someone
such as F*cker or Mother F**ker and That's Basically what we've Got here.