YA:Yet Another
YA:yaya Yet Another Ya-Ya (as in yo-yo)
YAFIYGI:You Asked For It You Got It
YDKM:You Don't Know Me
YGBK:You Gotta Be Kiddin'
YMMV:Your Mileage May Vary
YNK:You Never Know
YOYO:You're On Your Own
YR:Yeah Right
YSYD:Yeah, Sure You Do
YTTT:You Telling The Truth?
YYSSW:Yeah Yeah Sure Sure Whatever