While this word is a milder version of a curse word, it has the same flexible of that curse word. You are saying it for effect and not any direct meaning. I could rewrite the Tom Brady sentence and put freaking in nearly each spot and the sentence would still sound natural and be understood. It's a tougher concept, but has so much freaking flexibility! :)

Freaking is a milder form of a common English curse word, which I can't write because it's offensive. In your first sentence you are using freaking as a slang word. In the other two sentences, you are using freaking as a mild curse word or expletive. You would say this if you are irritated or slightly angry. Freaking is a crude word. It's okay to use it around your friends, but you should not use it at work or around older people or anyone you respect.

"He just saw Tom freaking Brady" or "He just saw freaking Tom Brady" - Either one of these is natural. It makes no difference and both are common. "He just bulldozed in there, like the freaking Swamp Thing" Only this one is natural. Swamp and Thing shouldn't be separated because it is a compound name and not a first and last name like Tom Brady. "Get your freaking dirty feet off the table" or ""Get your dirty freaking feet off the table" This is a toss up. Either one will work, but the first one is more natural because "dirty feet" is a set phrase and shouldn't be separated.

Tom freaking Brady is correct. Freaking swamp thing is correct. Dirty freaking feet is correct.