Well if other people want to copy her and use it too then let them.
I don't generally use the D-type acronyms and I never use AF or, heaven forbid, BD (baby dancing). I don't start threads in AIBU about other people using them either. I find anyone who says "babydust" utterly vom-worthy.
Since MN haven't banned us from saying cunt fuck and twat, they are unlikely to think manshape is unacceptable.
it's ok not to like it yourself. I don't like it much either. That's why I don't use it. It isn't reasonable to expect everyone to like and use the same phrases as you.