In the movie Predator (1987), CIA agent Dillon supervises Dutch & the team as they attempt to rescue the hostages held by insurgents.
The team discovers the damaged helicopter and three skinned corpses, Dutch identifies one of them as Green Berets. After they reach the insurgent camp and kill the insurgents we can see below conversation Dutch has with Billy.
Billy. Give me a way out of this hole. Aerial says we are cut off.
The only way outta here is that valley that leads to the east. I wouldn't waste that on a broke-dick dog.
What does Billy mean by saying Broke-dick dog?