It's a cinch

It's a (dead) cinch.

Fig. It's a very easy task. (Dead means absolutely.) Tom: Did you figure out how to change the tire? Jane: Yep! It was a cinch. Altering clothes patterns is difficult for me, but for Mary, it's a dead cinch.
See also: cinch
References in periodicals archive ?
I can't say I understand how the sharpening is done, but I don't really care because I like the result, it's a cinch to implement and understanding the technology won't improve the outcome.
Sure, it's a cinch to hide behind puff-pastry rhetoric like "wildly unconventional" and "in the most unexpected ways" when you don't have a fucking clue what it is you're writing about.