“They have choppers looking for them,” Sheriff Herrera says.
You can hear the choppers descending even if you have never set foot in the country.
Now they may lie in wait for choppers on rescue missions, says John Barry.
1550s, "one who chops," agent noun from chop (v.1). Meaning "meat cleaver" is by 1818. Meaning "helicopter" is from 1951, Korean War military slang (cf. egg-beater); as a type of stripped-down motorcycle (originally prefered by Hell's Angels) from 1965.
Teeth, esp false teeth (1930s+)