What it means
A doddle is something ridiculously easy, the sort of job you can breeze through without breaking a sweat. You'd call it a doddle when something that sounded like effort turns out to be basically free points. Very common in British English, often with a tiny smug grin attached.
Usage examples
"How was the driving test then? Absolute doddle, mate, I was back home before the kettle boiled. Jammy sod, mine had me sweating proper."
"Once you have done it once the rest is an absolute doddle."
"That maths homework looked grim last night, but it was a doddle in the end."
"Just follow the signs and scan the code, it's a doddle."
"That interview was a proper doddle once they stopped trying to act all serious."
Where it comes from
Its roots are hazy, but the likeliest link is to "toddle", an easy little stroll. A doddle is a task you could manage at a toddler's amble, no sweat and no skill required, sorted before you have even properly started.
