What is "mouthward"

Usage examples of "mouthward".

But even those who had taken in the spectacle with a jaded eye, jiggling neat Scotch not one whit on its journey mouthward as the pale intruder galloped roaring across the floor and knocked half the band flying (gravely wounding a clarinet player in the process), found themselves indescribably disturbed when the polar bear fell onto its knees just outside the door in Prince Albert Road and began to weep.