Go for it. Reach for your dreams.
Leering at fat people is assault.
Every comedian who's a touch overweight makes at least one joke about their overweightness. It's been driven into the ground multiple thousands of times.
Haven't you heard?
<a href="http://www.tmz.com/2006/11/20/kramers-racist-tirade-caught-on-tape/">Racist</a> is where the jokes are at these days.
Wow, all you need is a crap wig and a lisp and you've struck comedy gold.
It's one thing just saying you're gonna be a comedian. But it's a completely different think being a comedian. For a start, you have to be funny. LEE EVANS RULES!!!
You shouldn't do that.
It's okay to be funny, but not at other people's (including your) expense.