Police slang... Basic identifying information (name, DOB, address) is called "pedigree" information... Individuals unwilling/unable to provide such information have no "pedigree"... Hence, "Mutts"..
Sergeant: Did you get the pedigree on the drunk in Cell 3??
Patrolman: Naw, he's out of it... He's a mutt...
Patrolman: Naw, he's out of it... He's a mutt...
by Ptm368 November 6, 2020

"Shut up, you Mutt!"
by Ayoo_Frankie February 16, 2025

'Mutt & Jeff' is a fictional comic strip by Fisher; 'twas originally called 'A. Mutt'; for Jim Jeffries (Jeff) had not appeared yet.
George: 'Gilbert, would you like to see "Mutt & Jeff"; 'tis a bout Agustus Mutt and Jim Jeffries!'
Gilbert: 'Hey, so George, I'm supposed tuh be mean; so darn da NO!'
Gilbert: 'Hey, so George, I'm supposed tuh be mean; so darn da NO!'
by A Man Whom Just Submitted March 23, 2022

by Mutt fucker August 10, 2016

by Edward J. July 8, 2016
