To OK the deal? (using OK as a verb?)

Hi,

Since when can OK be used a verb? I mean I sometimes hear phrase like “decided to OK the deal” on CNN so obviously OK or okay is a verb now too. How often do you use it?

Thanks,
Torsten[YSaerTTEW443543]

TOEFL listening discussions: A conversation between two students (1)[YSaerTTEW443543]

Hi, Torsten

I just checked all my dictionaries and all of them showed “OK” as a verb too. For example:

And here:

thefreedictionary.com/okayed

Tom