Patchy

Judy’s memory is patchy, her speech is slurred.

Patchy outbreaks of rain are expected in northern parts this morning.

Patchy outbreaks of rain will soon fizzle out in the west, leaving the rest of the day bright and sunny.

I rang home on my mobile as soon as the patchy coverage along the route let me.

patchy clouds

a patchy performance

Added to these woes was the Treasury's demands for across-the-board train operator cost-cutting of broadly 10%. Passenger rail's slow, patchy and fragile recovery had the stuffing knocked out of it once more.