
Crook
Negative Connotation
When calling someone a 'crook', it insinuates they're untrustworthy and possibly involved in illegal activities.

Keep an eye on your wallet around him; he's a known crook.
Informal Usage
'Crook' as a term for a criminal is informal and may be disrespectful in certain contexts.

The kids in the neighborhood said the crook was hiding out in the abandoned house.
Not for Minor Offenses
Use 'crook' for serious dishonesty or crimes, not for minor rule-breaking or mischief.

He didn't just lie on his taxes, he embezzled money. That guy's a real crook.
Compare with
BurglarCheatDeceiveFraudsterLiarSwindlerThiefTrickster
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