Looking for the meaning or definition of the word under the counter? Here's what it means.
Adverb
Illicitly, against regulations, of goods kept under the serving counter in a shop to be unobtrusively passed to a customer who knows they are available for surreptitious sale (e.g. pornographic magazines in a newsagent).
Adjective
(Britain, Ireland, colloquial) (Particularly with regard to payment or taxavoidance) In an underhand way, sneakily. Unofficially.