Y2KYear 2000
YAAYet another acronym
YABAYet Another Bloody Acronym
YABSAYet Another Bl**dy Stupid Acronym
YAHOOYet Another Hierarchical Officious Oracle
YAISBYet Another Information Supercliche Book
YAMYet Another Meeting / Yet Another Modem / Youngster's Against McAfee / Youths Against McAfee
YAOTMYet Another Off-Topic Message
YBSYou'll Be Sorry
YCHTYou can have them
YGYoung Gentleman
YHBMYou Have Bin Mail
YHGASPLYou Have Got A Serious Problem Lad!
YHMYou have mail
YIPLYouth International Party Line
YKYHBxTLWYou Know You Have Been x Too Long When (eg YKYHBPDTLW - You Know You have Been Playing Doom Too Long When...)
YLYoung Lady
YLNTYou look nice tonight
YMYoung Man
YMMVYour mileage may vary
YMMVYour Mileage May Vary - meaning this was my experience yours might be different.
YMMVYour Mileage May Vary.
YMMVGYour mileage may vary greatly
YMSYoung Micro Systems
YMUY-Net Management Unit
YOYOWYou Own Your Own Words
YPYellow Pages
YSNYou suck Nerd
YSSYou Suck Severely
YSWUSYea Sure Whatever You Say!
YTDYear To Date
YTFYIG - Tuned Filter
YWSYLSYou win some you lose some


YMCA          :- Young Men's Christians Associations

YWCA          :- Young Women's Christians Association