haphazard

(colloquial, lighthearted) A photograph.

Things are not as bad as they seem.

Alternative form of happy as a clam

(dated) Angelman syndrome

plural of happy little vegemite

(Australia) A contented and well-behaved child; a very pleased person; often used ironically.

Any of a set of parameters for a quasi-experimental model used to describe the directional reflectance properties of the airless regolith surfaces of bodies in the Solar System.

(slang) A vertical line of hair that extends up along the middle of a person's (usually a man's) abdomen from pubic hair to navel.

plural of happy trail