พอแย้มปากก็เห็นไรฟัน
Romanization scheme
Meaning of the word in a Thai dictionary
1.
สำ
รู้ทันกัน, พออ้าปากก็เห็นลิ้นไก่ ก็ว่า.
To immediately see through each other; to know each other's intentions at once. Also said as 'as soon as one opens one's mouth, the uvula is visible.'