Fun fact! The blending of idioms is called a malaphor! They're a lot more common than you'd expect and I deliberately use them because I think they're more fun.

I love mixing idioms, that one in particular is fun to use.

I'm also a fan of "throw caution to the wolves".

You aren't entirely wrong... The comic character was named after milk toast, because it's so plain and bland.

does the pope shit in the woods?

“we’ll burn that bridge when we get to it”

When used in a fitting situation, that's one I've always really liked.

“we’ll burn that bridge when we get to it”

I use that so much I legitimately forget the whole "cross that bridge" when I'm in serious conversation.

My previous boss used to say "We'll blow that bridge when we get there"