breaker
Concise Oxford English Dictionary © 2008 Oxford University Press:
breaker/ˈbreɪkə(r)/
▶noun
- 1 a large sea wave that breaks on the shore.
- 2 a person or thing that breaks.
- 3 a person who interrupts a conversation on a Citizens' Band radio channel, indicating that they wish to transmit a message.
■ any CB radio user.
'breaker' also found in these Oxford entries:

