Frontsie

To her, the ethical thicket consists of "frontsies and backsies," a phenomenon she noticed in kindergarten.

Source: wiktionary

One of his favorites is "No frontsies, no backsies," so there was really no point in trying to butt in.

Source: wiktionary

He then suggests a lawyerly solution to her problem: just ask your friend to grant you a frontsie first, so that you can enter the queue in front of her, but promise that you will then grant her a frontsie in turn, by trading places with her, so that when all is said and done, you will have taken the queue spot right behind her but without violating the rule againsts backsies; you did it all by a seuqnce of frontsies.

Source: wiktionary

Backsies meant you let a kid cut behind you. A complex moral microcosm presented itself in the world of frontsies and backsies, with a wide range of available moral responses.

Source: wiktionary