interjection
all right!; good!; bingo!
An interjection muttered to oneself when things go as hoped; conveys quiet satisfaction or a sense of 'just as I planned'.
See also: しめた
しめしめ、計画通りだ。
All right, just as I planned.
しめしめ、誰も気づいていないな。
Good, nobody has noticed.