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1.
The amazing song from tbbt.

Soft Kitty, Warm Kitty.
Little ball of fur.
Happy Kitty, Sleepy Kitty.
Purr purr purr.
Sheldon: Penny, will you sing me the Soft Kitty song?

Penny: *sigh* Fine Sheldon.
Soft kitty, warm kitty.
Little ball of fur.
Happy kitty, sleepy kitty.
Purr purr purr.
Now go to sleep Sheldon
by Dinosarecool January 12, 2012
 
2.
When one singer starts a verse of a song, then a second singer begins the same verse after the first line is completed, as is often done during row row row your boat.
Taken from The Big Bang Theory.
Lemme jump in and we can Soft Kitty this shit!
by scifiducky October 27, 2011