1)Dull: adjective – to describe something as bein’ terrible, something that makes you sick with disgust because it’s so stupid to even think of.
2) Spit: verb – to say
3) Dun: noun – the person in question, dude, guy, etc. It’s whoever I’m talkin’ about and its non-gender specific.
4) Put it where the goats can get it: verb phrase – to make it as elementary as possible. To put it at ground level so everyone can understand it.