Macquarie Dictionary:
pakapoo ticket
/pakuh'pooh tikuht/.
noun
something that looks confusing or incomprehensible: marked like a pakapoo ticket.
[from a Chinese game similar to Lotto, involving the purchase of a pai ko p'aio, literally, white pigeon ticket, having a range of characters on it which the purchaser then marked off. The packapoo ticket was indecipherable to most colonials.]
pakapoo
/pakuh'pooh/.
noun
a type of Chinese lottery using slips of paper with sets of characters written on them.
Also, pakapu.
[Cantonese, equivalent to Mandarin bái ge piáo, literally, white pigeon ticket; originally a trained white pigeon was used to choose the winning characters]
This was a common expression when I was at school . More than once it was used by teachers to describe my homework assignments. I was not alone in receiving this criticism.
I'm reminded of the word recalcitrant.
No student of Normanhurst Boys' High needed to rush to the dictionary when Australian PM Paul Keating used it to describe Malaysian PM Mahathir Mohamad. It was firmly in our lexicon like: 'not masticating confectionary during periods dedicated to pedagogical exertions'; write it out 50 times.