by word of mouth
US /baɪ wɜrd əv maʊθ/
UK /baɪ wɜrd əv maʊθ/

1.
via mond-tot-mondreclame, doorvertellen
through people telling each other rather than through advertisements, etc.
:
•
Most of our business comes by word of mouth.
Het grootste deel van onze zaken komt via mond-tot-mondreclame.
•
The news spread quickly by word of mouth.
Het nieuws verspreidde zich snel via mond-tot-mondreclame.