Think about this and you can figure it out. An idiom seems to mean one thing but actually means another. Does "with regard" mean just what it seems to? Yes, it does. Therefore, this phrase is not an idiomatic expression.
an idiomatic expression
idiomatic expression
"You" is not an idiom. It is a pronoun.
Idiomatic expression
humbly
Not trustworthy
Jasjs
Give me 1 example of idiomatic expression
This expression means real and simple.
yes it is
babysitting
Cockney-stink