To "drop the idea" means to abandon or give up on a particular plan, thought, or suggestion.
Sentences with «to drop the idea»
Though who knows, even they will eventually even drop the idea of holding on to type or letters? (graffuturism.com)
Our financial advisor dropped an idea the other day... I really liked it. (wealthpilgrim.com)
However, it does ship a large volume of devices and will most probably drop the idea until later, in case sufficient supply of parts isn't guaranteed. (neowin.net)