jig ‧ ger ‧ y-po ‧ ker ‧ y /ˌdʒɪɡəri ˈpəʊkəri $ -ˈpoʊ-/ BrE AmE noun [uncountable]
British English informal secret dishonest activity to make something seem what it is not:
There’s been some jiggery-pokery with the figures.
jig ‧ ger ‧ y-po ‧ ker ‧ y /ˌdʒɪɡəri ˈpəʊkəri $ -ˈpoʊ-/ BrE AmE noun [uncountable]
British English informal secret dishonest activity to make something seem what it is not:
There’s been some jiggery-pokery with the figures.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012