The meaning of the Acronym HB is...

HB is

• Happy Birthday

More Meanings For HB:

• Happy Birthday
• How Boring
• Handsome Boy
• Hydrogen Bonded
• Hydrogen Bonding
• Horizontal Bridgeman (crystal)
• Hot Bands
• Humanities Building
• Heartless Bitch
• Horny Bitch
• Hell Bitches
• Homely Bastard
• Horny Bas
• Hose Bag
• Hard Black

HB is also in:

• Adults
• Chat
• Chemistry
• Clothes
• Colors
• Electronics
• Physics
• SMS
• Universities