hashtag

A metadata tag, signaled by a preceding hash sign (#), used to label content.

I support the hash tag convention: http://tinyurl.com/2qttlb #hashtag #factoryjoe #twitter

You can also search for a hashtag by typing a topic (without the #) in the search box and clicking Search.

The hash sign itself, especially when used as part of a hashtag.

I sound like a shitty mother and wife. Or at the very least an inadequate wife and ungrateful mother–which is in stark contrast to the image I try to portray on Instagram. Hashtag happy life. Hashtag beautiful family. Hashtag blessed.

You're perpetually stoned, aren't you? Hashtag four twenty four seven.

To label (a message) with a hashtag.

The photo-sharing site was riddled with fake accounts that liked, followed and hashtagged out the wazoo. Then came the great “Instagram Rapture,” Instagram’s pledge last December to clean out the fake accounts and do “everything possible to keep Instagram free from the fake and spammy accounts that plague much of the web.”