if it's the last thing I do

if it's the last thing I do

Used to emphasize one's dedication to achieving something or completing some action. I swear, Father, I will avenge you and the rest of our family, if it's the last thing I do! I've been training all my life in this sport. By God, I'm going to win a gold medal if it's the last thing I do!
See also: if, last, thing
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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