A person with a giant back
, but an incredibly small penis. To make up for insecurities resulting from
a case of babydick, a fat back
will overcompensate and take advantage of any oppurtunity
to brag about his or her hugeness, back
When everyone started talking about
their penises, Mike the Fat Back quickly changed the conversation: "I'm the only one who can get this tattoo 'cause my back's so big"