niet onder stoelen of banken steken

Literally, “to not put [something] under chairs or couches”, that is, to not hide something or withhold information.

niet onder stoelen of banken steken

1. (idiomatic, transitive) To be very frank and not withhold information about something.

   Tijdens de bijeenkomst stak hij zijn politieke ideeën niet onder stoelen of banken. ― He was very frank regarding his political ideas during the meeting.

• Always in negated form, but sometimes nooit (“never”) may be used instead of niet (“not”).