An Australian variation of 'wanker'. Like a wanker, a flog is someone who is full of themselves and makes a point of letting everyone know. However, where a wanker's braggadocio may have some small basis in fact (eg. they say the are the best singer in town and they can actually sing pretty well), a flog's self-image is divorced from reality to a farcical degree (eg. they say the are the best singer in town and they sing completely off-key). A try-hard.
Note: Flog and wank are also synonyms in their more literal usage, as both words mean 'to masterbate'.
Boofa's a total flog - was doin' doughies out front of the cop shop like he was a real tough cunt and then BANG, blew both his rears.
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