There is an idiomatic phrase I have in my head but I can't seem to find it in online resources so I'm wondering if I've misremembered and in fact it doesn't exist or if I've remembered it correctly but it's not used outside of my circle.
The phrase is
I would've taken [personal pronoun] arm off!
It means to be feel that an offer is extremely good such that one would rush to accept.
Normally the day rate is 100, but he offered me 200 for half a day's work - if I hadn't been preoccupied I would've taken his arm off!
It's a metaphor imagining the offer was a morsel of food in the palm of a hand offered to the speaker, which he would devour so enthusiastically that the hand and its arm were eaten as well.
Has anyone else heard this?