sleight of hand

sleight of hand () — ловковть рук; наперсточничество; хитрость; ловкий трюк, прием (обманный)

1. ways of deceiving people which you need skill to do.

Example: Some mathematical sleight of hand was required to make the figures add up.

2. quick, clever movements of your hands, especially when performing magic tricks.

Example: With impressive sleight of hand he produced two pigeons out of his top hat.

(Cambridge International Dictionary of Idioms)