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1.
The act of eating a girl's pussy after cumming in it, causing cum bubbles to form in the vaginal cavity.
Man, I was eating my girl's pussy and I realized I was bubble blowing, because I had just shot my load in her. I almost gagged.
by PSYCH0 September 06, 2006
 
2.
when blowing bubbles on a males dick for the pleasure of doing so.
bubble blowing is when a girl may blow bubbles on a guys dick for fun or out of boredom.
by NB:) September 13, 2011