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2 definitions by Niall's Mofo

 
1.
A pen pal is a person with whom one becomes friends by exchanging letters via mail
Kellin: "yay, my letter from my pen pal from sweden just came in!"
Mom: "What did she say sweetie?"
by niall's mofo November 18, 2012
 
2.
A new name for Directioners.

When One Direction memeber, Niall Horan, tweeted about fans calling them "mofos." Many of the fans acted quickly, especially on tumblr. They decided that would call themselves Niall's mofos instead of Directioners.
Girl 1: OMG I'm a Directioner for life

Girl 2: Shut up, if you really were, you'd be calling yourself Niall's mofo.
by Niall's Mofo May 28, 2012