Apparently it was originally taken from the word 'Yeah', which was taken from 'Yes'. People often say yes to rejoice, so saying 'Yay' is equal to it.
Jun 20 2006, 5:41 AM
Baloo55th
Answer has 3 votes
Baloo55th 22 year member
4545 replies
Answer has 3 votes.
Been around for at least 12 years that I know of - so how new is new? Possibly from 'yea' rather than 'yeah'. Pronounced like 'yea' but with a different intonation. 'Yea' goes with things like 'verily', whereas 'yay! has an exclamation mark built in and goes with things like 'pub!'.
Jun 20 2006, 12:34 PM
EggoWillie
Answer has 2 votes
EggoWillie
Answer has 2 votes.
Also, Yay is a slang term for Cocaine.
Jun 20 2006, 12:36 PM
MyAlias
Answer has 3 votes
MyAlias
Answer has 3 votes.
The term is actually "Yayo" made popular in Oliver Stones (screenplay writer) Scarface.
Jun 20 2006, 1:29 PM
zbeckabee
Answer has 3 votes
zbeckabee Moderator 19 year member
11752 replies
Answer has 3 votes.
The really, really, really OLD "yay" goes back to the beginning of time...