Tacky-bonk

=

Pit bank / Spoil heap / Slag heap

In the black country we say:

Tacky-bonk

This translates to:

Pit bank / Spoil heap / Slag heap

Example Sentence
We used to play on the tacky-bonk as kids.
Description
'Tacky-bonk' or 'Tocky-bonk' are Black Country dialect terms for a pit bank, the spoil heap of waste material from a coal mine (a 'bonk').