Top Definition
Downingtown-East legend who was popular among large groups of juniors during spring of 2009. Mysterious facebook jokester (nobody truely knows who he is). Suspected to be on the Downingtown East baseball team. The legend of Joseph Callahan sparked many other fake facebooks such as Zach Peterson, Chad Williams, and David Harsky.
"who is joseph callahan?"
by Downingtown East9 January 12, 2010
5 Words related to Joseph Callahan

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