1941 bombing slang.
The word "clobber" was from British air force slang, probably related to bombing. It was used as early as 1941. Please see the related link below.
The cast of Camp Clobber - 1958 includes: Allen Swift as Clint Clobber
I clobbered him last night
Springtime for Clobber - 1958 is rated/received certificates of: USA:Approved USA:Passed
Clint Clobber's Cat - 1957 was released on: USA: July 1957
Clobber's Ballet Ache - 1959 was released on: USA: January 1959
it means smite
Slobber, clobber, and jobber all rhyme with robber.
Old Mother Clobber - 1958 was released on: USA: 2 September 1958
The cast of Old Mother Clobber - 1958 includes: Norma MacMillan as Penelope
Clobber's Ballet Ache - 1959 is rated/received certificates of: USA:Approved (PCA #06129)
Camp Clobber - 1958 is rated/received certificates of: USA:Approved USA:Passed (National Board of Review)