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xsden.info
ai1 means begging, sai1（篩） means swinging
又ai1又篩 is a common term in Cantonese, used to show how eargerly you beg others
ai1 refers to the tone, while 篩 refers to the act. Just imagine a little girl begging you to buy sthing: she may ask with a crying/sad tone (ai1) , and swing your hands to show she desperately wants it.
Thanks! I suppose the “laat3” part…I probably misheard and is just the final particle 啦？