being skinny means you have little fat or muscle and are very weedy. EAT MORE!!!!!!! the other meaning for skinny is thin or takes care of your body.
"The skinny on..." something is a relatively recent idiom that means to give the bare facts about something without a lot of unnecessary detail: a concise, detailed report on.
Skinny dipping means to swim nude (naked) I think its against the law maybe.
that you are probably good at playing the piano, duhhh.=]lol