Not familiar with the term "layabout"...
A "layabout" is a lazy, feckless or indolent person.
Since we are here to learn Gaelic, not English, it doesn't matter what layabout means. It matters what leisgeadair means. It is a person who is leisg, 'lazy'.
Autocorrect on Google keyboard (Gaelic) offered Leòdhasach instead of leisgadair!
a layabout is a waster
"leisgeadair" is not at all clear, it is spoken so fast.
I put " Are you a lazy person?" and was marked wrong. No. Duolingo wrong!!!!!!
I wouldn't use the word layabout, but would say "an idler"; but this was marked wrong.