fluke 
/ˈflu:k/ noun
plural flukes /ˈflu:k/ noun [count] informal : something that happens because of luck : an unexpected or unusual thing that happens by accident
▪ Her second championship shows that the first one was no mere fluke. ▪ By some strange fluke we ended up working for the same company.
▪ Her second championship shows that the first one was no mere fluke. ▪ By some strange fluke we ended up working for the same company.
