bags on (something)
slang The right to possess or take something, or the rights to have first choice of something; dibs on (something). "Bags" are usually claimed verbally. Primarily heard in UK. I call bags on the front seat! Hey, I had bags on being first in line!
bags (I)...
(British English) (American English ˈdibs on...) (informal) used especially by children for claiming the right to have or do something before anyone else: Bags I sit in the front seat!