A muffin that it looks like a group of guys jizzed on it and then another guy came and took a shit on the jizz mountain.
Can also be used as a compliment
"Yo look at these jizzshit muffins i baked"
"Dam u look like a real jizzshit muffin today <3"
Jizzus is when a man is performing intercourse with a woman who often exclaims "oh my God" during moments of pleasure, and the gentleman therefore climaxes to the mental image of Jesus Christ, and since the man is not properly hydrated, he dry-fires inside the woman but she still becomes impregnated, mirroring the emaculate conception of Jesus Christ
George Stephanopoulos: " Hey I heard you nailed Mrs. Huck last night, how did that go?".
Alexander Dumas:"yeah, she kept on screaming 'oh my god!', so when I finally nutted I had a jizzus."