A fork of Rural Dictionary
This phrase can be used to put emphasis on how giddy a friend, colleague or a familiar is.
It is usually used when said people have a sense of achievement or acquired something cheaper.
It can also refer to masturbating your anus with one of your fingers because you're too ugly to get laid.
Man 1: " I got a 2 for 1 deal on these sandwiches!"
Man 2: *makes masturbation gesture* "Finger bum wank sandwich deal!!! You're really saving those pennies!"
Or
Man 1: "Hey I got her number!"
Man 2: "Finger bum wank! She's only the village bike Mr sloppy seconds!"