It is when you form a bubble of spit
on your tongue
it off with just the right wind speed that
it doesn't pop. The bubble then lands on a surface but does not go more then a few seconds before succumbing to a puddle of saliva.
Johnny can now blow spit bubbles on command without any trouble. Because
as a child the dumb fuck swore so much that
the dishsoap his mom used to rinse his mouth out with permanently fixated itself in his saliva.
Person: Aw fuck man how long have you been
on my food?
Person 2: You know
when you complained about somehow getting herpes?
Person: Yea but that
was a month ago...
Person 2: ...