back in my Ugly inside days there was a phase on there of calling people names like Bulb and Balloon head, i've never heard of them until then but are apparently common insults in certain parts of the country. Another bizarre one to me was Mackerel, found it pretty funny, remember being in London around 2000 and one of the locals i was with looked at a group of lads who walked past and said "mackerels, the lot of 'em" which they didnt seem to like.