What the hell does "Scots-Irish" even mean?

[pugbug]

Here's another definition for you -- Scots-Irish refers to people who are of Irish decent but speak Scots, a Germanic language variety spoken mostly in Lowland Scotland and Ulster (which goes along with the Ulster theory presented earlier). My English cousin married someone who considers herself "Scots-Irish", since she is from Ulster and knows a bit of Scots, and this is the only definition I was aware of until now.