Term used by people in Florida to describe a strong and nasty thunderstorm.
Hey mike, I can't come over right now, I got a frog-strangler going on outside and it has the road in front of my house closed.
noun, an exceedingly large rain storm, a torrential downpour, greater than simply "raining cats and dogs," a rain event marked by even adept amphibians drowning.
Were you in New Orleans for that frog strangler that hit last year?
it means it is raining really really hard
even more than cats and dogs, so much rain that the frogs will drown!
That storm last night was really a frogstrangler