simple english question

i know this is kinda weird coming from an australian…
What does “ood years” mean?
like when someone says, they make you work for 20 odd years
???
Answer #1
that means that “they make you work for around 20 years or so” So its like an about this many years, so in about 13 ood years this will happen. Which means in about 13 years this will happen
Answer #2
I know what it mean…But can’t explain it…Something like approximately…
Answer #3
thank you