I had to search for some specific Portsmouth slang. I didn't know all of them, but these are all very familiar.
http://www.portsmouth.co.uk/news/people/eight-words-or-phrases-you-ll-hear-in-portsmouth-but-not-in-southampton-1-6958379
The most surprising one is 'Mush'. I had always assumed everybody knew this word.
Here are eight traditional Portsmouth words and sayings you are unlikely to hear at the other end of the M27.
1. Mush
Pronounced Moosh. An old Romany word meaning ‘my good friend’.
2. Dinlo
A lighthearted insult meaning fool. ‘Din’, ‘Dinny’ and ‘dinny dinlo’ are also used. The term apparently has its roots among the Romany gypsies, who still use it.
3. Squinny
To complain, or be a complainer. This term can be used in a number of ways - as a verb: stop sqinnyin!, a noun: ‘stop bein’ a squinny, baby!’ or even as an adjective: ‘she’s well squinny’, meaning ‘she’s a real complainer’.
4. Gettin lairy
What someone is doing if they are losing their patience/temper.