shonky
adjective
[ ˈʃɒŋki ]
• dishonest, unreliable, or illegal, especially in a devious way.
• "shonky political goings-on"
shonky
noun
• a person engaged in suspect business activities.
• "we need to rid the building industry of these shonkies quickly"
Origin:
1970s: perhaps from English dialect shonk ‘smart’.