The characters Dexter and Judy are allusions to F. Scott Fitzgerald's other work The Great Gatsby because the characters are very similar to Gatsby and Daisy.

Peturbation= a disturbance

Neurasthenic cow= A cow that has, chronic nervous exhaustion, fatigue, and hypersensitivity

Veranda is a roofed, open-air porch or gallery attached to the exterior of the Golf Club, often extending across the front and multiple sides.

Surfeit means an excessive amount of something, in this case kisses.

Mirth means gladness, amusement, or high spirits. In this context though she doesn't have these traits in her smile.