A strange practice amongst dentists whereby when the patient is out under anastesia they slap the patients genitals with a cods head.
Hence the phrase " I even managed to charge her for the codding "
" She was well and truly codded"
" Do you know I went to the dentist and came back with my chuff stinking of fish , I think the dirty bastard codded me "
"I always find that the old patients are the best for codding."