Definition of clobbers:
(v) :
(transitive, slang) To hit or bash severely; to seriously harm or damage.
(v) :
(transitive, computing, slang) To overwrite (data) or override (an assignment of a value), often unintentionally or unexpectedly.
(n) :
(slang) A thumping or beating.
(n) :
(Australia, British, slang) Clothing; clothes.
(n) :
(British, slang) Equipment.
(n) :
A bash on say the head, typically with a tool or object rather than with fists.