collars up

Verb

collar up (third-person singular simple present collars up, present participle collaring up, simple past and past participle collared up)

1. (transitive) To apply a harness to a horse.
2. (transitive) To put a collar on a dog (a band or chain around an animal's neck).
3. (intransitive, e.g., a drill) To build up a lip or collar around a hole.
4. (intransitive) To raise the collar on a shirt or jacket (the part of an upper garment (shirt, jacket, etc.) that fits around the neck and throat).
5. (intransitive) To engage in a collar trade (taking equal but opposite positions in a put and a call with different strike prices).
6. (intransitive, transitive) To arrest (someone); to arrest one or more people.