plonk

The word 'plonk' is a classic example of onomatopoeia, a linguistic formation where the sound of the word imitates the sound it describes. It emerged in the late 19th to early 20th century, echoing the dull, heavy, hollow thud of an object being dropped without care. This direct sound-meaning connection provided a vivid and efficient way to name both the action and its resultant noise. The later, informal British meaning for cheap wine, first recorded in the 1930s, is thought to derive humorously from the sound of a bottle being plonked down on a counter, or perhaps as an alteration of the French 'vin blanc' (white wine) in Australian slang, which then transferred to British English.

This is an onomatopoeic simplex word. It imitates a dull, heavy, hollow sound, likely of Germanic origin, and functions as both a verb and a noun based on this sound symbolism.