Bob's Your Uncle

 is a Mister Handy in Fallout 4.

Background
Bob's Your Uncle is a Mister Handy found running around a pre-War horse track competing against other robots such as Iron Maiden, Ol' Rusty, The Boston Blaster, Atomic Dreamz, Lady Lovelace, Piece o' Junk and Tin Man at Easy City Downs. If detected by the raiders he will become aggressive.

Appearances
Bob's Your Uncle appears only in Fallout 4.

Behind the scenes
The phrase "Bob's your uncle" is a phrase that is sometimes used as a colloquial way to end a long and winding explanation.