Etymology: < Malay abbrev. of satu kali, 'once' adj.
1. conj. Introducing an ironic (usually humorous) hypothetical situation.
2011 SAMUEL CALEB WEE on Facebook, 28 Aug Sekali a tick for Tony Tan passes but a tick for TCB kena spoilt.
2011 LIM JIA HUI on Twitter, 14 Sep LOL, my mom added me on FB. Scarly the next day she follow me on twitter.