bird dog

Short definition from Wiktionary

Noun

1. 1
   A gun dog used in hunting waterfowl and other birds to flush, point out, and/or retrieve the birds.
2. 2
   A tout.
3. 3
   A person who seeks out real estate investment opportunities in exchange for a fee.
4. 4
   A radar detector (for detecting police speed traps).
5. 5
   A hyperextension exercise performed lying on the knees, with one arm and the opposite leg lifted.
6. 6
   A person who tries to steal someone else's romantic partner
7. 7
   Alternative spelling of bird dog.

Verb

1. 1
   To watch closely.
2. 2
   To seek out.
3. 3
   A multiservice tactical brevity code requesting configuration of sensors.
4. 4
   Alternative spelling of bird dog.