Help! One of my faucets at home has crappy water flow, while the rest of the faucets are strong. Yes, I checked the valves underneath. Even when I turn hot and cold to full blast!
Faucet clogged? Something stuck?

Have you checked the aerator on the faucet it's a small cap that screws on the end of the faucet where water comes out. If you unscrew the cap there is small screen inside it could be clogged.

Help! One of my faucets at home has crappy water flow, while the rest of the faucets are strong. Yes, I checked the valves underneath. Even when I turn hot and cold to full blast!
Faucet clogged? Something stuck? Please help, I don't wan't to pay $100 for a plumber.

As you have found out there can be several things that make your water flow crappy, I would guess you have already spent an hour trying to figure out what the problem is, now some one will recommend that it is a problem in your faucet, so you can go buy a faucet, install it, turn on the water and still have crappy water flow. That means that you will have spent a few hours and several dollars and still don't know why you have crappy flow.
I don't mind at all you not wanting to pay a plumber $100 to find and repair your problem but please don't make it sound like that the plumber is screwing you for charging you $100 for his service.

Help! One of my faucets at home has crappy water flow, while the rest of the faucets are strong. Yes, I checked the valves underneath. Even when I turn hot and cold to full blast!
Faucet clogged? Something stuck?
If you've checked the aerator and you still have poor pressure when it's off then shut the water off to the faucet and open it up. If a two handled faucet check the seats for trash. If a one handled faucet pull the cartridge and check the inlet ports foir a clog. On both types turn the watter back on for a moment to flush out the valve body and supplies. Good luck, Tom

Cookiedough disagrees: Sarcastic, not helpful at all.

Cookiedough I did not mean to sound Sarcastic, I was only pointing out the fact that when you try your best to repair something or try to find a problem and you have no luck that a good plumber is not out to cheat you, most of the time they have spent a lot of time working on you particular problem and that with the experience they have accumulated over the years they are able to solve problem and so their charges are most of the time very reasonable.
Forgive me if I made it sound sarcastic.