A person who derives from the countries "Wales" and "Scotland", they prefer to be called "Squelsh" as they see themselves as special from the rest of the UK.
Chad:"Hey I heard you're from Scotland and Wales that's pretty cool"
Mickey:"No sir Chad I am "Squelsh", not from them commonercountries"
A person who lives in a damp region such as a bogland or swampy area. This refers to the noise their feet make when they walk. Predominanly found in Northern Ireland around the South Eastern shores of Lough Neagh in the Gawley's Gate locality.
That fellow might live in the town now and be relatively civilised, but he was once a bog trotting squelchy....you can tell from the wellington boots and dungarees tucked inside.