Acronyms dictionary HBD What does HBD mean? HBD is an acronym for Happy Birthday. It’s often seen as a lazy way of messaging someone on their birthday. It’s also occasionally used to mean here be dragons, referring to unexplored or dangerous territory ahead. Examples of HBD Writing HBD on someone's Facebook wall instead of happy birthday translates to, "I like you, just not enough to type two whole words." @Rollinintheseat, October, 2015 "HBD" is what you write when: Your fingers are lazy. Your care factor is zero, or thereabouts. You've had a creative brain fart. Adam Bub, mamamia.com.au, May, 2017 #HBD to America’s 3rd president, Thomas Jefferson! @HouseGOP, April 2018 SEE MORE EXAMPLES Just Added trigger law, bystander effect, CSI effect, Streisand effect, L + ratio Note This is not meant to be a formal definition of HBD like most terms we define on Dictionary.com, but is rather an informal word summary that hopefully touches upon the key aspects of the meaning and usage of HBD that will help our users expand their word mastery.