- noun the penis. A term probably influenced by ‘plonk (down)’ in the sense of place down heavily or present defiantly. The word has been in use since early in the 20th century. It was rarely heard during the 1960s and 1970s but was revived during the 1980s vogue for ‘schoolboy’ vulgarity.
- noun a dickhead. Inspired by the previous sense of the word and by the suggestion in ‘plonk’ of ponderous or clumsy movement, this usage became a vogue term of the late 1980s.
- noun a gaffe or blunder
- noun a kiss, particularly a heavy smacker