1. Ta-ta for now; used to end e.g. e-mail or a text message

Encyclopedia: TTFN

• hardboard
• hardbound
• hardcore
• hardcover
• harden
• Hardenbergia
• Hardenbergia comnptoniana
• hardened
• hardener
• hardening
• hardening of the arteries
• hardfisted
• hardhead
• hardheaded
• hardheads
• hardhearted
• hardheartedness
• hardihood
• hardily
• hardiness
• Harding
• hardinggrass
• hardish
• hardline
• hardliner