"Too many chefs in too many pies" (from "too many chefs spoil the broth" and "one finger in too many pies");

"it's like stabbing a hole in the dark" (from "a stab in the dark" and "hole in the dark");

"stop pissing on my thunder" (from "stop stealing my thunder" and "stop pissing on my chips");

"we'll burn that bridge when we get to it" (from "we'll cross that bridge when we get to it" and "don't burn your bridges").