1o_ It is an error, or a version, of scaaching, which is a deformation of scacuating, which in Spain is a festive version of. It consists of the prefix es- ( intensifier ) the verb shit ( "defecate") the verb zurrar ( "defecate") the enclytic is . 2nd_ On the above meaning, you can also use the verb zurriar as "punish", so 'shit' would be interpreted as "damaging" and then the meaning can be "hurt". 3rd_ As it is a word of colloquial use and very rare, it can have more interpretations, considering that zurrir is "make a thunderous sound" and zurrigo in some of its meanings is a "penis".
