This is a metaphor, specifically a simile.
Palestinian and Persian
food
Meaning he will help you out.
It is just an idiom and has no history.
The origin of the idiom finger in every pie is unknown. The saying means being involved in a lot of things or knowing about a lot of things.
The correct idiom is "wet (not split) one's whistle," which means to take a drink, typically an alcoholic beverage. It dates back to the late 16th century and likens the throat to a whistle that needs to be moistened in order to properly produce sound.
As clean as a whistle.
very messy
Advertising
To be exposed
Origin "up a storm"
...a whistle
No
Palestinian and Persian
food
RELAX
To hope for the best