Gypsy-

"Rise when the Rooster Crows" has versions back to the 1920's but it is written in a minstrel style which could put the origin back in the mid to late 1800's.

"Flaoting" verses are just verses taken from other songs and added on to the song. The last verse is a floater:

Whatcha gonna do when the women all dead?
Gonna sit in the corner with a hung down head
Well if I had to marry I wouldn't marry for riches
I'd marry a big fat gal who couldn't wear the britches

Floaters appear in lots of different songs. The Binkley Brothers version has three verses and what appear to be two floaters at the end.

Hope that helps,

Richie