brainchild
Something that one has thought of or devised, especially when it is creative or clever. This harebrained scheme was your brother's brainchild, wasn't it? This feature is my brainchild, and I'm going to see it through till the end, don't worry. If this thing was your brainchild, can you explain to me what the heck is going on here?
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.