Something that's extremely easy. A combination of the phrases "Piece of cake", "Cake walk", & "Walk in the park", all of which mean something that's very easy. A piece of cake is a piece of cake & a cake walk is walking with a cake, so a piece of cake walk would be walking with a piece of cake. A walk in the park is walking in the park, so a piece of cake walk in the park would be walking in the park with a piece of cake.
A Cake Walker is a person that always breaks and falls to another who makes them feel bad about something. Who breaks under another... meaning the other person is normally a (Manipulator)
Dude my dad is a Cake Walker he falls for everything I say.
That chick is a Cake Walker she be Fallin for everything..