Justin Samuel Halpern (born September 3, 1980) is the American author of the Twitter feed "
Shit My Dad Says" and the best-selling book
Sh*t My Dad Says. He was also the co-writer and co-executive producer of a
CBS television situation comedy series based on the book. His second book
I Suck at Girls was published in 2012 and was the basis for the 2014 television show
Surviving Jack.