ruts

Sexual desire or oestrus of cattle, and various other mammals.

The noise made by deer during sexual excitement.

Roaring, as of waves breaking upon the shore; rote.

A furrow, groove, or track worn in the ground, as from the passage of many wheels along a road.

A fixed routine, procedure, line of conduct, thought or feeling.

A dull routine.

“Dull job, no interests, no dates. He's really in a rut.”