I wouldn't advise raw whole eggs, could make you ill.
I used to drink 6 egg whites blended with 1/2 pint of milk - like swallow a pint of spit. But it worked, it was cheap and boosted my protein levels.
Unfortunately, I got food poisoning eventually (no surprise) and was very very ill, lost a load of weight also. After that I had to lay off the raw egg thing permanently.
Now I use protein drinks only.