Mutt, to Jeff is a term that refers to the relationship between two people. The first person, Mutt, is shorter than the second person, Jeff. The crossword solutions for this term are PAL, which is an acronym for 'PAL' or 'FRIEND', and TALLER, which refers to the difference in height between the two people. Mutt, to Jeff is a humorous way of describing the relationship between two people who have a significant difference in height.