'Dayvan' is a phonetic spelling of the the word divan, which is the name of a sofa-like piece of furniture, and seems to be commonly used in more rural settings.
'Dayvan cowboy' is just another clever way of describing someone who experiences excitement vicariously, rather than actually doing it themselves. Similar to 'armchair warrior', 'armchair quarterback', etc.
He's a real dayvan cowboy - all he does is watch tv, rather than going out and doing it himself.
slip of the tongue perhaps,
Those idiots who drive around in a ridiculously raised pick up truck, making a top heavy vehicle even more top heavy and unstable
A:*gah*
B: "Whats the matter"
A: This dam prickup is blinding me.
B: Stupid thing's, as if there lights weren't blinding enough as it is.
Someone who jumps from one relationship immediately into another one.
Serial monogamists can not stand to be alone and often suffer from vast commitment and insecurity issues.
Because they jump into relationships immediately after the previous one has ended, serial monogamists typically don't take the time to reflect on their behavior or why their previous relationships failed; thus, they end up making the same relationship mistakes over and over again.
Person 1: Damn, Dustin already has a new girlfriend?! It's only been two weeks since he broke up with his fiance! I think he's a sociopath.