noun Informal.

an amateur photographer, especially one who is greatly devoted to the hobby.

Origin of shutterbug

First recorded in 1940–45; shutter + bug1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Word Origin and History for shutter-bug

"enthusiastic amateur photographer," 1940, from shutter (n.) + bug (n.) in the "enthusiast" sense.

Online Etymology Dictionary, © 2010 Douglas Harper