Dead Aunts

Clint is visiting friends in Culantro on his way to Quebrada Tula when Rigo, a student at the university, says his only problem lately is dead aunts. He is practicing English. Clint asks what could be the problem with dead ants? Sweep them out.
"What killed them? Poison?"
Juan says they were all strangled.
"How do you strangle and ant?" Clint asked, then added, "Oh, shit "