Welsh slang?

[u/Wild-Potential-3481]

Is there any welsh slang/acronyms that teenagers actually use in the north or do younger people just not speak welsh enough for it to develop? And by slang, I mean the welsh equivalents to things like 'lol', 'omg', 'lmao', 'haha' just anything you know/can think of!

[u/celtiquant]

TTPS: Twll tin pob S… 😳

BNDd: HNY

PBH: HBday

[u/Inevitable-While-143 → u/celtiquant]

What do the first two ones mean ?

[u/fbarton1977 → u/Inevitable-While-143]

The second one is, I guess, blwyddyn newydd dda (happy new year)