MOney; Paper. Bay area word used to describe money.

The Yay Area's way to say money
Yay area = San Fran Bay area, California
Major Cities are San Jose aka San Jo, San Francisco aka The City, Oakland aka the O and more
There is so much Bay area slang, see hyphy, scraper, batch, go dumb, thizz, stunna shades etc.

Expression of agreement or excitement

Yayo,coke,cocaine a drug derived from the leaf of the yayo plant