A cream-e also known as Eulers-cream is when you ejaculate in 2.718281828459 seconds.
This is very similar to a cream pi, where you cum in 3.14159265359 seconds.
Dude 1: So how was your date last night?
Chad 2: We did so much foreplay i accidentally made a cream pi
Dude 1: Well, I made a cream-e looking at Riley Reid yesterday