a doddle
a doddle
That which is very easy or effortless to do or accomplish. Primarily heard in UK, Australia. I found maths to be a complete doddle in secondary school, so I was taken aback by how hard it was for me in university. We expected this match to be a doddle, but the Australian team proved to be a tougher opponent than we'd anticipated.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
(it’s) a ˈdoddle
(British English, informal) used to refer to a task or an activity that is very easy: The first year of the course was an absolute doddle.Farlex Partner Idioms Dictionary © Farlex 2017