Definition of lovebug
: a small black fly (Plecia nearctica) with a red thorax that swarms along highways in the Gulf states of the United States
Origin and Etymology of lovebug
from the fact that it is usually seen copulating
First Known Use: circa 1966
Seen and Heard
What made you want to look up lovebug? Please tell us where you read or heard it (including the quote, if possible).