| fake it |
| fall out(verb, expression, oppose, object, divide) |
| falter(verb, shake, pause, sway, vary) |
| feign |
| feud(verb, oppose, object, divide, conflict) |
| fight(verb, oppose, object, divide, conflict) |
| flicker(verb, shake, pause, sway, vary) |
| flirt(verb, play, abuse, waste, trick) |
| fool(verb, play, abuse, waste, trick) |
| fool around(expression, play, abuse, waste, trick) |
| fool with(expression, play, abuse, waste, trick) |
| forge |
| forswear(verb, promote, fake, plant, deceive) |
| four-flush(verb, fake, alter, counterfeit, fabricate) |
| frame(verb, promote, abuse, fake, plant) |
| frame up(verb, expression, fake, alter, counterfeit) |
| fritter(verb, play, abuse, waste, trick) |
| give snow job(verb, expression, idiom, promote, twist) |
| gloss(verb, fake, alter, counterfeit, fabricate) |
| go back from(verb, expression, phrasal verb, nonobservance) |