Lawn carp.

I just got around to reading the Sunday Boston Globe, and there was an editorial about the problems cause by too many Canada geese. The editorial on page D10 isn’t available online any more but it had this observation:

…the thousands of Canada geese that befoul public playing fields, beaches, and golf courses throughout Greater Boston have taken on a verminous quakity. Many don’t bother to migrate and are so lazy that they have earned the name “lawn carp.”

[...]

But the ability of a single Canada goose to produce upwards of a pound of droppings per day has resulted in many a ruined outing for people who seek to enjoy the water’s edge.

I just can’t help thinking that there is a metaphor in there somewhere.