Plock. Very explicit synonym for garbage or “crap”

What means Plock?

noun. A short, low clicking sound. as modifier 'when a rock makes contact with the stomach there is a sickly plock sound'

What is the meaning of Plack?

1 : a small billon coin of Scotland issued from James III (second half of 15th century) to James VI (early 17th century) also : a corresponding unit of value half-plack coin. 2 archaic : a paltry bit : trifle.