Comic Strip / The Lockhorns
An one-panel, gag-a-day Newspaper Comic
created in 1968 by Bill Hoest, continued since his death in 1988 by Bunny Hoest and John Reiner.
The comic's protagonist are Leroy and Loretta Lockhorn, a married couple who hate each other.
That's pretty much all there is to it. The strips usually feature Leroy and Loretta making passive-aggressive, sarcastic one-liners at each other, whether to the other's face, or to some third party, though light satire of everyday life also abounds.
This comic features tropes such as: