Idiom Definition:
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"to hit the head"  
    to use the toilet    
            
Synonyms: 
bathroom, can, commode, dump, eliminate, empty, evacuate, john, ladies', latrine, lavatory, leak, loo, mens', pee, piss, pot, potty, powder room, privy, restroom, throne, tinkle, toilet, urinate, void, washroom, winkle, wizz, WC
 
    
