I have seen skinny dudes squat their asses off and still have skinny legs. (fitnessandpower.com)
I read the Charles Atlas ads (bully kicking sand in the face of a weak as a flea fart skinny dude) that appeared in the comic books and I of course sent away for his free booklet which revealed his amazing story. (fitness-ebooks.com)
There were bunny rabbits and stuff like that, but I think they all worked as skinny dudes (gamesrevisited.com)