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1.
A man who likes to go to public toilets without locking the door.
I were suprised by the slocker when I opened the door
by Dan Hejnes March 08, 2005
 
2.
Mendip caving slang for a cave entrance that has been used as a dump. Possibly very old term but widly used now.
Ee slocked it down that there hole. i.e Stoke Lane Slocker
by brucester September 16, 2006