Lewis Short
poppysma | poppys-mus, i (noun N.m) : n., and , , m., = πόππυσμα and ποππυσμός
* A smacking or clucking with the tongue, as a sign of approbation, Juv. 6, 584; on occasion of lightning, as a religious ceremony,Plin. 28, 2, 5, § 25; of a similar sound,Mart. 7, 18, 11.
Charlton T. Lewis, Charles Short, A Latin Dictionary