'verbification of initials made sound'.
How about:
Acronymic verbing

A useful term in its own right, mav.

But to be in the same category as emcee your examples would need to be
ayvee (for Acronymic Verbing/AV)
and aitchayendee (for Have A Nice Day/HAND)

The "sounding out" of the initials - as in okay - is quite a distinct feature.
And hopefully a rarity!