scum

The trial also made national news after Ortega cross-examined Border Patrol sector chief Gregory Bovino about previous comments he had made describing undocumented immigrants as “scum, filth and trash.”

"They're just scum," he said, on his second pint, claiming that it was "an invasion".

“They said you describing illegal aliens, and or criminals, as scum, trash and filth is misconduct. Isn’t that correct?”

When this occurs, blue-green algae can form blooms that discolour the water, or produce floating mats or scums on the water's surface.

Sometimes Rayner admitted she had gone too far, once apologising for describing senior Conservatives as "a bunch of scum".