A funny way of saying that you or someone else is nervous. It’s a lyric form an Eminem song called “lose yourself” from the 8 mile sound track
The example in the song/movie:
“There’s vomit on his sweater already, Mom’s Spaghetti, he’s nervous”
When it’s your moment to shine. This is you’re one shot. 15 minutes of fame.
Yo tobias you got this!
I know it’s my mom’s spaghetti!
When you're hooking up and she's on her period and it gets all over your balls.
Jim: Did you fuck her?
Tom: Bro It was mom's spaghetti all up in there.
There's vomit on his sweater already, mom's spaghetti