A byproduct of cheese making and milk straining. Also used as an exclamation of excitement, most commonly in texts and online messages. The reason people can't just leave a 👍 on the message is unknown.
Usually written in upper case with multiple "Y"s. Extra exclamation marks are optional.
Possible pronunciations include:
W-hey!
Way!
Weh-hey!
"So, I'll be able to drive you to the garden centre on Tuesday."
To be shouted repeatedly whenever elements of lad culture are evident, comments more suited to the FHM letters page than sophisticatedconversation.
lad 1: "So basically, I was completely fucked, y'know, I'd had like, two dozen pints, yeah, and this bird, yeah, she's fuckin' lovin' me, and you know what I did don't ya? I shagged her, didn't I!"
lad 2: "Whey!"
lad 3: "Whey!"
lad 4: "Whey!"
(repeat until no longer funny)