The phrase "to drop a hint" means to subtly suggest or give a clue about something without directly saying it.
Sentences with «to drop a hint»
You can also drop hints about content as part of a learning campaign, to build anticipation. (growthengineering.co.uk)
So my girlfriend kept dropping hints of what she wanted in a ring so off to work i went, visiting stores, checking weekly catalog sales, browsing online. (ritani.com)
You've dropped some hints on this story a few times in your posts, but thanks for finally sharing the details. (financialsamurai.com)