jar

The expression "jar" derived from a practice among figurine collectors, where they place the figurine inside a glass jar, and then slowly fill the jar up with cum. It may also be used as a reaction or response emoji toward someone posting about their figurine collection.

Degen: More figurines arrived today!! <image of Aqua and Yunyun>
User 1: do you put them in jars?
User 2: 🫙
User 3: LMAO, he's gonna jar them too
User 4: NOOO, not Aqua!
Degen: There's nothing weird about collecting figurines... some people collect weird keyboards !
User 1: I've never seen someone jar a keyboard before ...