After ejaculating onto the torso of a woman, collapsing onto her, thus creating a "sandwich" in which the two torsos are the outer chocolate cake-like wafers, and the jism is the "ice cream" between the two.
After Jack unloaded his skeet on Jill's chest, he passed out on her and they ice cream sandwiched until he woke up.
"Dude, did you see Mark at the party last night?! He came so hard on Dana that he passed out and they were totally forming an ice cream sandwich! I got a picture on my phone!"