dibs on

(first) dibs (on something)

slang The rights to something, or the rights to have first choice of something. "Dibs" are usually claimed verbally. I call dibs on the front seat! Hey, I had dibs on being first in line!
See also: dibs

dibs on something

a claim on something. I've got dibs on the yellow one! Dibs on the front seat!
See also: dibs, on