(petroleum industry, slang, US, dated) A micropaleontologist, particularly a foraminiferologist.

(petroleum industry, slang, US, dated) A microfossil, particularly a foraminiferan.

Alternative form of snug as a bug in a rug

Alternative spelling of mealybug

Alternative spelling of doodlebug

A tag stamped with a number, placed in a geocache (often attached to another item, called a hitchhiker) so that subsequent finders can take it to other caches and track its movement around the world.

Synonym of bee in one's bonnet

A shield bug of the genus Antestiopsis, a pest of coffee plants.

(US, colloquial, simile) Completely crazy; insane.

(simile) Very cute.