cucking-stool
Concise Oxford English Dictionary © 2008 Oxford University Press:
cucking-stool /ˈkʌkɪŋstuːl/
▶noun historical a chair to which disorderly women were tied and then ducked into water or subjected to public ridicule as a punishment.
– origin ME: from obs. cuck ‘defecate’ (because a stool containing a chamber pot was often used).
'cucking-stool' also found in these Oxford entries:

