This is an inconsistent tag with no wiki description. Most examples seem to be forced_ejaculation, but others, such as post #2376629, seem to involve leaking_cum after cum_inflation, but they don't always show an indication of force.

Should this be aliased to forced_ejaculation or does it have a specific use I'm missing?

probably a bad use of "forced". in this instance it seems to mean "through the application of force" rather than how the word is generally used in tags to mean "against a character's will".

this seems closer to, like, "squeezing or pressing on a character's body in order to more quickly expell cum from an orifice".