That dynamic, unique, juggling, complex motion of boobs as a woman jumps, jogs, or walks. The word saves people from saying 'movement of boobs', a rather awkward phrase that usually needs awkward hand motion to get your point across in public.
ex)
A: Do you remember the boobement of Angelina Jolie at the end of Tomb Raider?
B: Yeah, but I personally think the boobement of Pamela on Baywatch had more impact on the general audience.
When a guy has his woman bent over the front of the toilet and he's hitting it from the back, just before he finishes, he puts her face in the toilet water to enhance their(his) climax.