Whom of which, a valid expression?

Question

I recently encountered this expression and I'm pretty much stumped. People seem to be using it in place of "who". Example:>[...] they were developed by non-medical professionals whom of which have applied their skills to help solve a health care / medical problem they had faced.Another example:> As well as Dave, special thanks goes to the 'Girls in Pink' for providing a high service throughout the whole day, as well as club chairman, Bob Thomsett and Chrissie whom of which manned the kitchen which was busy all day.I can't quite wrap my head around the expression, but I figured it might be one of the many idiosyncrasies of the English language. Is this a valid expression or some newfangled bastardisation?

Answer 1

This is not a correct expression. Avoid at all costs!