Bum rut
A path worn in the grass on the side of a road caused by beggars soliciting handouts from passing cars.
There is always a bum begging for money at that intersection, they have been at it so long there is a bum rut worn into the lawn.
Bum rutting
Another euphemism for anal sex
Bro: How'd it go with Sarah last night?
Bro 2: Had some major bum rutting
*high five*
Bro 2: Had some major bum rutting
*high five*