or considering the cowboy boots I reckon Vinnie could be saying:
"yippie yi yo kayah"
which has its origins from the Bing Crosby 1930's song 'Im An Old Cowhand'
not from Bruce Willis in Die Hard although he made a version of it famous (Die Hard 4.0 is on down here in an hour for all you fans)
https://www.youtube.com/watch?v=jo-pApe1Kd0
I reckon you will enjoy this old Bing clip Trish