1. (

• sneak_thief ,
• pilferer ,
• snitcher ,

) a thief who steals without using violence ;

2. (

• fink ,
• snitch ,
• snitcher ,
• stoolpigeon ,
• stool_pigeon ,
• stoolie ,
• sneak ,
• sneaker ,
• canary ,

) someone acting as an informer or decoy for the police ;