be a piece of cake

To be a very easy task or accomplishment. I thought I was going to fail the test, but it turned out to be a piece of cake!

(British, American & Australian) also be a piece of piss (British very informal)

to be very easy 'How was the test?' 'A piece of cake!' The interview was a piece of piss.

Name	Pronounced	Usage
Merletta	mur-LET-ə	English (Rare)
Olivia	ə-LIV-ee-ə (English), o-LEE-vyah (Italian, Spanish), o-LEE-vee-ah (German), O-lee-vee-ah (Finnish)	English, Italian, Spanish, German, Finnish, Swedish, Norwegian, Danish
Mayamiko	mah-yah-MEE-ko	Southern African, Chewa
RacŁAw	RAHTS-wahf	Polish
Ceara	-	English (Rare)
Larrie	LER-ee, LAR-ee	English