The bulk update request #8830 is pending approval.
create alias belly_pop (170) -> belly_bursting (0)
create implication belly_bursting (0) -> bursting (402)
create alias eye_popping (38) -> eye_bursting (0)
create implication eye_bursting (0) -> bursting (402)
create alias prostate_popping (4) -> prostate_bursting (0)
mass update exploding_penis -> penis_bursting
create alias burstpreg (9) -> bursting_birth (0)
Reason: Various tags that should imply bursting, and aliases to wording that reflects that. Generally, "bursting" is used for body parts, while "popping" is used for objects such as inflatables.
As a side note, there are various bursting_* tags that are for parts of the body (breasts, penis) 'bursting' through clothing, as in wardrobe_malfunction.
I don't know if an alternative exists, but maybe one should be established to avoid confusion with this definition of bursting.
Updated