Shut up, buddy, you've forgotten that I can't run. Now you're the wise guy, hah? 1994, Milton Teichman, Sharon Leder, Truth and Lamentation: Stories and Poems on the Holocaust, page 58:
Isaac Sachs makes a 'Hah?' noise. 'You're not Sixsmith's niece?' 2004, David Mitchell, Cloud Atlas, London: Sceptre (Hodder and Stoughton), →ISBN:
(Manglish, Singlish) Synonym of ah (sense 1); used to form tag questions prompting the listener to confirm something.
Mother: Just wait awhile, Susan. Jack said he’d be a little late. […] What would you like to drink, some Coca Cola?
Susan: That’s alright Aunty. We’re going out to dinner.
Mother: Or you prefer Pepsi, hah? We don’t drink Pepsi ourself, I always keep a few bottles just in case. Some people are so fussy. 1989, Eleanor Wong, Jackson on a Jaunt, or, Mistaken Identities, page 5, lines 23–31:
(Manglish, Singlish, after lah or ah) Used to form a tag question, either to invite acknowledgment, or to ascertain the continued attention of the listener.
So, just make sure you don’t accidentally mix the two together lah, hah?
(Manglish, Singlish) Tagged at the end of a confirmation-seeking sentence to express subtle surprise or realisation.