ratter [
'rætә]
n. 捕鼠者, 叛变者
ratter[ noun ]- a disloyal person who betrays or deserts his cause or religion or political party or friend etc.
<noun.person>
- any of several breeds of terrier developed to catch rats
<noun.animal>
Ratter \Rat"ter\ (r[a^]t"t[~e]r), n.
1. One who, or that which, rats, as one who deserts his
party.
2. Anything which catches rats; esp., a dog trained to catch
rats; a rat terrier. See {Terrier}.