To slew somebody is to essentially make them feel inferior in an argument. a proper slew is to do this in rhyme form.
The word itself can also be used as a term of inferiority on its own (i.e. this man get slew)
Popular farmland slang for excessively wet and runny hog and/or cattle diarrhea. Slew is never used as fertilizer as it is the wrong consistency in that of regular manure.
ex: drew is at a party and a friend calls
Friend: "Hey drew, where ya at?Lets party!"
Drew: "aahh, I'm driving down Birdneck right now. I'll give ya a call later."