what should i use if i fish off a dock in a really really weedy area i tried some lizards on top but i didnt catch any thing

Plastic worm (powerbait) with a heavy bullet sinker to get it through. Also if there is alot of surface weeds try a weedless frog. (spro frog) If there isnt any suraface weeds run a RatLtrap, popper or a buzzbait over them and try to call the bass out.

Try a Moss Boss!

Good luck.

These are pretty good responses you are getting, but here are a couple more -- try a grass jig (it will probably have to be pretty heavy to get down) and consider a GULP! worm (Turtle Back) as another T-rig option (I fish a similar area from bank and use 3/8 and 1/2 oz bullet sinkers).  Also, if you can, try throwing a Chatterbait along the edges of the grass.

I like using braid in weeds.... power pro

try using a topwater bait

I fish any kind of plastics in weedy areas. Senko, kreatures, sweet beavers, tubes, jigs. My favorite is 6" senko in watermelon/chartreuse on sunny days and dark days usually black/chartreuse, black/yellow or black/purple.