shady deals, under-the-table dealings
Tiene chanchullos que ni te imaginas.
He's involved in shady dealings you can't even imagine.
— Cadena perpetua (1994)
Siempre anda metido en chanchullos.
He’s always involved in shady dealings.
Busque a otro para sus chanchullos.
Find someone else for your shady dealings.
— Cadena perpetua (1994)