A sensation experienced by larger women, similar to an orgasm. Due to the size of the specimen the nervous system is severely impaired and so the sensation can take up 33 1/4 days for the electrical impulses to reach the synapses involved with pleasure.
The sensation is common in most women above 15 stones, but especially effect midgets.
1. I can't belive anyone would put up with Sally's smell long enough to give her a HippoGasm.
2. June the office is not an appropriate place to have a HippoGasm, you're fired.