Meaty plonker

1. An abundantly large penis, possessed of both girth and width

2. A large stool that lands with a loud "plop" and sinks to the bottom of the toilet

3. An overweight or well-built stupid person

"Look at the meaty plonker at that guy, he'd break your pelvis"

"Some sneaky bastard left a meaty plonker in the toilet, I'll smoke him out"

"Get off the road you meaty plonker!! What are you trying to do, get us all killed?!"