Cumflation:

The act of injecting ludicrous quantities of spooge (usually greatly exceeding the volume of one’s own body)
into a receptive sexual partner, causing their entire body to swell up like a balloon.
It is a combination of sorts of hyper and inflatophilia.
Usually seen in furry or other types of cartoon porn as doing this in real life would prove excessively difficult, regardless of one’s confidence in his own manliness.