yaeger-miser, that lump is your xiphisternum (or xiphoid, or xiphoid process) - everyone's got one, some a bit more prominent than others (like ears)
<joke>Its a small triangular piece of cartilage that anchors a ligament connected to your ass - if you remove it, your ass falls off...</joke>
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"Bother," said Pooh as he struggled with /etc/sendmail.cf, "it never does quite what I want. I wish Christopher Robin was here."