To sing with no words. An old form of singing popular in the early part of the 20th century.
Also related to stoke symptoms effecting the face.
Bee bop balooda.... Shoop shoop dee shoop... and so on and so forth.
The left side of his face spontaniously started skatting...
Shoo ba duwadawada or other random letters strung together with a similar rhythm
"FUCK YOU LEE! ... Shoo ba duwadawada"
"What the fuck was that?"
"skat is shit porn ahahahahaha"
"*sighs* douche bag."