Hello.
In the last few days, I tried a bit to populate the frilled bikini top tag and also the frilled bikini bottom tag. In exchange, I've removed the frilled bikini tag.
The description in the wikis seems rather clear (well, I changed it a bit) and describe pretty well how I think bikini posts should be tagged.
Background are posts like post #2836936 where you an only see the bikini top and it seems backwards to me to tag this with frilled bikini since you can only see the top and "bikini bikini_top" on one posts should not exist. Also because bikini top doesn't imply bikini.
The same also goes for other patterns (stripes, polka dot, plaid, checkered) and of course colors (red, blue, yellow etc.).
I still kept low with populating these tags since the concensus was that posts still get tagged with frilled bikini despite only the top being visible (post #2841373) and if the oncensus is for nuking the top/bottom tags, then it would at least be less tags to be aware of.