Origin of litterbug

First recorded in 1945–50; litter + bug1
Related formslit·ter·bug·ging, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Word Origin and History for litterbug

1947, from litter + bug (n.). According to Mario Pei ("The Story of Language," Lippincott, 1949) "coined by the New York subways on the analogy of 'jitterbug' ...."

Online Etymology Dictionary, © 2010 Douglas Harper