sous le comptoir

listen to the pronunciation of sous le comptoir
الفرنسية - التركية
tezgâh altından
الفرنسية - الإنجليزية
under the counter
In an underhand way, sneakily. Unofficially
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)

When Prohibition became the law, they produced the stuff in greater quantity and sold it under the counter to anybody who wanted it.

under the table, in an illegal manner; against the law
الفرنسية - ألمانية
unterbau