SMOKE out of exhaust!!

Yea, so im drivin the other day comin home and i come around a corner by my house and one of my neighbors sees a huge puff of smoke, a little blue, come out of my exhaust. He told me about it right away and i havent driven the car since except for when my dad drove it and i looked at it when he pressed the gas, sure enough, there was a shitload of smoke and it reaked. Any ideas what this is or how it can be fixed, or what causes it? Thanks a lot.

Blue smoke is oil burning. Might want to do a compression test, find out if your rings are bad. If the compression is good, its your valve seals and/or guides.