| Term | Full Form | Category |
|---|---|---|
| FLK | Fetal Lamb Kidney | Others |
| FLK | File Lock (FuJe Software) | Others |
| FLK | Filter Kit | Others |
| FLK | Fog Light Kit | Others |
| FLK | Folger Levin & Kahn LLP | Others |
| FLK | Front de Libation du KebeK | Others |
| FLK | Fuel Line Kit | Others |
| FLK | Funny Looking Kid | Others |
| FLK | Funny Looking Kid (British doctors humor) | Others |