if it’s the last thing I do

I

if it’s the last thing I do

Meaning

• indicates determination to achieve something
• used after a statement of intent to do something
• … and I’m absolutely going to do it
• … I’m dedicated to doing this
• sometimes used as a threat (example 5)
• sometimes shows stubbornness;
• … and I’m not going to stop until it’s done (example 6)

Example Sentences

1. I am going to get this house cleaned today if it’s the last thing I do.
2. I am going to learn to play the guitar if it’s the last thing I do.
3. I will see this project through to the end if it’s the last thing I do.
4. She said she was going to become his wife if it is the last thing she does.
5. I’ll teach you to respect me if it’s the last thing I do.
6. I’m going to get my point across if it’s the last thing I do.

Origin

The origin of this phrase is unknown.  “The last thing” indicates a sense of finality. It literally means if it’s the final thing I do before I die. But the phrase’s figurative meaning is closer to: I will definitely do this before I die, or simply: I will definitely do this.

Synonyms

• if it kills me
• and you’re not going to stop me