To hit the road.=To leave or to begin a journey.
During my vacations, I like to hit the road for anywhere.
Monkey in the middle.=To be in the middle of an argument.
When my kids start arguing, I’m the monkey in the middle.
In the state of flux. = Mass confusion.
After the typhoon, this area was in the state of flux.
Wholeheartedness.= To give it all you got.
Wholeheartedness is necessary for success.
From the jump.= From the start.
From the jump, it was an exciting game.
In a heartbeat. = Very very quickly.
If I see money on the street, I grab it in a heartbeat.
Underwater. = Bankrupt.
A lot of spending and no savings is a good way to go underwater.
Riding dirty. = Driving without a licence.
If you ride dirty in Japan, you lose your car.
Humungous. = Very very huge. *Humongous (英)
A new baby is a humungus event.
A job-hopper. = Someone who changes jobs often.
Recently there are many cases of job hopping in Japan.