How to Say "mafia-like" in Spanish
The Spanish word for “mafia-like” is “mafioso” — B2 level.
English → SpanishB2
adjectiveB2informal
resembling mob style

Examples
Ese tipo tiene un aspecto muy mafioso.
That guy has a very shady/mafia-like look.
No me gustan sus métodos mafiosos.
I don't like his shady/mob-like methods.
El negocio cerró por sus tratos mafiosos.
The business closed because of its corrupt dealings.
Matching the Noun
Since this is a describing word (adjective), it must match the thing it describes. Use 'mafioso' for masculine things (un negocio mafioso) and 'mafiosa' for feminine things (una mirada mafiosa).
Using it for any crime
Mistake: “Su robo fue muy mafioso.”
Correction: Su robo fue muy profesional/sucio.
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