lovebug
noun
love·bug ˈləv-ˌbəg 
: a small black fly (Plecia nearctica) with a red thorax that swarms along highways in the Gulf states of the U.S.
Example Sentences
Recent Examples on the Web Every year like clockwork, Valentine's Day rolls around and holiday jewel tones are swiftly replaced by every shade of red and pink imaginable. Storefronts — both of the brick-and-mortar and online varieties — catch the lovebug, and boom! 
Karina Hoshikawa, refinery29.com, 31 Jan. 2020 Fun facts: Female lovebugs are bigger than their male suitors. USA TODAY, 1 Sep. 2017 Butterflies fluttered in the shade of sunlight dappled by the Spanish moss dangling from oak trees and lovebugs rested on tangerine and lemon trees scattered throughout the property on a recent morning. Jason Ruiter, OrlandoSentinel.com, 29 May 2017
Karina Hoshikawa, refinery29.com, 31 Jan. 2020 Fun facts: Female lovebugs are bigger than their male suitors. USA TODAY, 1 Sep. 2017 Butterflies fluttered in the shade of sunlight dappled by the Spanish moss dangling from oak trees and lovebugs rested on tangerine and lemon trees scattered throughout the property on a recent morning. Jason Ruiter, OrlandoSentinel.com, 29 May 2017 Word History
Etymology
from the fact that it is usually seen copulating
First Known Use
circa 1966, in the meaning defined above
- in-migrant
- in-migrants
- in-migrate
- in-migrated
- in-migrates
- in-migrating
- in-migration
- in-off
- in-pig
- in-plant
- in-print
- in-process
- in-service
- in-store
- in-your-face
- in/at one fell swoop
- in/at one go
- in/for the foreseeable future
- in/from the depths of someone's heart/soul/being
- in/into care
- in/into gear
- in/into high gear
- in/into the swim (of things)
- in/into the swing of
- in/of the order of