“In the past, there have been even bigger mammals, such as giant ground-sloths and Titanotherium, a beast like an overgrown elephant and the largest land mammal ever.”
“It is hard work because it is like hacking your way through an overgrown jungle path with a machete.”
“If you have a bed that is overgrown with weeds, it's okay to till it under and start again.”
overgrassed
(obsolete) Overstocked, or overgrown, or covered, with grass.
