From Wiktionary, the free dictionary
Calque of English fair play
chwarae teg m (uncountable, not mutable)
- fair play (good behavior)
- Antonyms: chwarae annheg, chwarae brwnt
chwarae teg
- fair play (+ i (“to”)) (used to congratulate someone)
- Chwarae teg iddyn nhw! ― Fair play to them!