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

1.
kulaktan kulağa, sözlü olarak
through people telling each other rather than through advertisements, etc.
:
•
Most of our business comes by word of mouth.
İşimizin çoğu kulaktan kulağa yayılır.
•
The news spread quickly by word of mouth.
Haber hızla kulaktan kulağa yayıldı.