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1.
1) The event and resultant mess of a package of macaroni (often a box of Kraft brand Macaroni and Cheese) rupturing because of human error.

2) The spillage of a package of macaroni during and because of rough oral sex.
1) "Dude, someone set off a macaroni bomb in the hallway. There's fuckin' macaroni shit on the god damn fuckin' carpet!"

2) "Bitch, not now I'm trying to consume my macaroni. {Macaroni bomb occurs.} Look what you made me do, bitch! I set off a macaroni bomb on my new shoes, bitch."
by Kevin_K November 27, 2005