streaky 
/ˈstri:ki/ adjective
streak·i·er; streak·i·est /ˈstri:ki/ adjective [also more streaky; most streaky] 1 : having or showing streaks
▪ streaky windows 2 chiefly US : good or successful at some times and bad or unsuccessful at others : not reliably or consistently good
▪ a streaky player/golfer ▪ The team's play has been very streaky this year. [=the team has played very well at times and very badly at other times]
▪ streaky windows
▪ a streaky player/golfer ▪ The team's play has been very streaky this year. [=the team has played very well at times and very badly at other times]
