You (can) bet your (sweet) life phrase
You can be absolutely certain that something is true or will occur.
You can bet your life that he is a liar.
You can bet your life that she will be the next chosen applicant.
You can bet your life that he won’t dare to express his love to her.
Meaning absolutely certain or without a doubt
Another way to say "absolutely", "definitely" or "for sure"
That's absolutely right.
Totally certain.
With absolute certainty; decisively
1.(adj) Very busy
2. At maximum speed, efficiency, or power
1. Being flat-strap with his part-time job, he neglected his study.
2. We are working flat-strap to complete the project on schedule.