to hold in the mouth

https://pixabay.com/th/photos/%e0%b8%aa%e0%b8%b8%e0%b8%99%e0%b8%b1%e0%b8%82-%e0%b8%ab%e0%b8%a1%e0%b8%b2-malinois-%e0%b8%ab%e0%b8%a1%e0%b8%b2-gabin-4008227/