strike me lucky

English edit

Derived from the old custom of striking the hands together, leaving a luck penny in the seller's hand as an earnest that the bargain is concluded.

(obsolete) Exclamation for good luck while making a bargain.
(archaic) Expressing astonishment or emphasis.
Synonyms: strike me blind, strike me pink, strike me silly, strike me up a gum tree
- 1902, George Cupples, The Green Hand, page 18:
  Well, strike me lucky, mates all, if the whole affair warn't a complete trap!