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1.
A type of laugh which signifies one has just thought of a 'Ya mum joke.' Yet they choose to keep it to themselves. The use of 'Huaha' is to signify that a 'Ya mum' joke could be made out of a statement which was previously said and therefore makes other people look for it.
User: I was riding my horse the other day.

(What he thinks) user 2: 'I rode your mum like a horse the other day.'

(What he says) user 2: Huaha!

(What he thinks) user3: 'Where is the 'Ya mum' joke... Oh I see it.'

(What he says) user3: I spotted it too. Lol!
by XISnowFlakeIX August 05, 2010