BD

When used in acronyms such as hbd and hlbd, bd pretty clearly stands for "birthday." Less commonly, some texters and online chat users may use bd as a standalone abbreviation that means "birthday."

If you thought BD stood for "big deal," well, it does. When used by itself, BD most commonly means "big deal." Those who use bd to mean "birthday" either can't be bothered to type out the two extra letters needed to spell bday or don't understand how ambiguous bd can be.

You can emphasize the importance of something, such as an issue, person, or an event, with "BD," which stands for "big deal." For example, you might say, "Getting married is a BD; make sure your wedding day is what you want."

Most people use BD when messaging via text or online. However, they may also use it on social media and in emails. And if it's a huge deal, a person may use the BFD acronym. Or, if it's not that big of a deal, you can use the NBD or INBD acronyms.

Or, "backdooring;" a League of Legends term that refers to a strategy in which players use their champions to attack turrets or the enemy's Nexus without pushing a corresponding lane first; to employ this strategy, players generally need an element of surprise and some sneaky tactics.

The official abbreviation for Blu-ray; may refer to a Blu-ray disc or player.