The phrase "dead fleas" is a figure of speech that refers to something or someone who is unimportant or insignificant. It implies that this thing or person holds no value or consequence.
Sentences with «dead fleas»
After the first wash, you will literally see hundreds of dead fleas falling off your beloved dog. (pesthacks.com)
With in seconds of spraying my dogs, I was pulling dead fleas off of them. (1800petmeds.com)
Next day using vacuum cleaner collect all the mixture together with dead fleas and what is most important with flea eggs. (howfacecare.com)