| Fatigle | Very tired bird of prey |
|
| Festivalium | Tranquiliser for big events | |
| Fisticupcakes | Hitting someone with a spongy teatime treat | |
| Flagonfly | An insect in your beer | |
| Fledam | An insect in your cheese | |
| Flobstacle | Something in the way of a spittoon | |
| Footpathematics | Calculation of how many flagstones you need | |
| Forkupine | Eating implement with many prongs | |
| Formaldehiecrust | Mummified pastry | |
| Froccoli | Vegetable in a dress | |
| Frognosis | Predicting the course of a disease in an amphibian | |
| Funstable | Laughing policeman |
