BFF
noun
ˌbē-ˌef-ˈef 
plural BFFs
informal
: a very close friend
A BFF doesn't gossip about or lie to you. She doesn't share your secrets on her MySpace page. 
Girls' Life
Girls' Life
Word History
Etymology
Best Friends Forever
First Known Use
1978, in the meaning defined above
- little toe
- little tuna
- little tunny
- Little Vehicle
- little walachia
- little whaup
- little white heron
- little woman
- little wonder
- little-boys' breeches
- little-ease
- littlehead porgy
- littlemouth porgy
- littleneck
- littlenecks
- littleness
- littlenesses
- littler
- littles
- littlest
- Littleton
- littling
- littlings
- littlish
- littoral