Yarn
Slang for an apocryphal story.

Y Pb Pr
Luminance , two chrominance channels of blue minus luminance, red minus luminance. Technical shorthand for component video .

Y Cb Cr
Luminance , two chrominance channels of blue minus luminance, red minus luminance. Technical shorthand for component video .

Y R-Y B-Y
Luminance , two chrominance channels of red minus luminance, blue minus luminance. Technical shorthand for component video .