noun
[noncount] chiefly Brit informal :cheap wine that is not of good quality
verb
plonks; plonked; plonking
[+ obj] Brit informal :to drop or place (something or someone) in a forceful and often careless way :plunk
plonk down
[phrasal verb]
plonk down or plonk yourself down Brit informal :to sit or lie down suddenly in a careless way
US