Its tough!

 Its not all "peaches and creamcheese".  (I like that better than peaches and cream!)

They are just "driving us through the mud" (at least they aren't dragging us).

We were "worked up around the axel".

They always just "kick the can down the lane".

Go Line!

 We are on the "one yard go line"!

We aren't playing checkers, it is a "game of chest". And we're losing.

Well, isn't that just "honky dory"?

How do Pants Fly?

 We are going to kill it!  Go hung ho!  (Gung ho)

We are just flying around like the seat of our pants.  (almost, but not quite)

He has jumped in with two feet first. (With both feet?)

Well, we can't do anything about it now.  The bus has left the train.

We have to keep going.  Can't take the pedal off the gas now.

Sounds Uncomfortable

Stepped in a bee's nest.

He got his features in a wad.

She did great in her expedition match (exhibition)!

They work great when they work co-harmonously (harmoneously).

We will CONCUR this challenge (conquer). 

Well, don't think about it!

 I'm having "back flashes" just thinking about it.  (Flashbacks)

We will get ourselves in a perlickament. (predicament)

He keeps going and doesn't miss a beep. (beat)

It has been sitting in lingo since last time someone looked at it. (limbo)