Top definition
A Phrase originally from The Hilarious film step brothers

What Derek Huff says to his son in complete despair When Dale says something truly stupid. Asking if bonito fish are big ?
Dale:are bonito fish big

Tommy: Whats this guys deal ?

Derek:Ah...I dont know son
by Ahidontknowson May 17, 2011
Get the mug
Get a I dont know son mug for your Uncle Vivek.