A.k.a. "garnished generosity". Refers to da "snooty-friends/cousins/siblings procedure" of retaining/withdrawing/consuming all of da "goodies" from a particular lot of items, and then pretending to be lovingly/caringly thoughtful of you by giving you da remaining items, which are inferior or less-desirable in some way.
A classic example of selective sharing would be during snack-time, whereby da gluttonous and sweet-toothed connivers --- instead of carefully/conscientiously dividing up da tasty and not-so-tasty comestibles evenly among everyone present --- first select all of da best and most-palatable selections from da goodies-platter for themselves to guzzle up, and then leave you wif just da blander and/or less-chewable/digestible selections, such as da veggies, chocolates wif coconut centers, overly-firm/spicy chips, etc.
by QuacksO April 22, 2021