When your child misses his mouth or dumps some food that is likely to stain all over his clean clothes, oblivious to the time and energy it took to get him cleaned up and looking presentable.
Oh shit, honey, we have spillage! He just pulled the blueberry pie off the counter all over the new white shirtyour mother gave him.
A phrase most commonly used by students, spillage is lickage quite literally means what it says; if you spill something, you have to lick it up. This often refers to a spilled alocholic beverage, but if you also have the misfortune of spilling your meal over the kitchenfloor, or spilling your wee sample, you better get licking.
-"Oh my God, I just spilt my drink everywhere"
-"spillage is lickage"
-"I just spilt my drink on her crotch"
-"Tactical spillage!"
The friend who always manages to spill something when they come over to your place.
Note: The spillage idiot can often locate items to spill where there were previously believed to be none. This often happens in student dwellings.
Crash! Glug, glug, glug..
S.I.: "Whoops, sorry!"
Rug-owner: "Argh! You fool of a took!"
S.i.: "It wasn't there a minute ago."
Rug-owner: "Oh Reeaally? That would mean something if it wasn't coming from the Spillage Idiot. Oh, hang on, that's my girlfriend's mug.. it hasn't been seen for months.. how..did..?"
Spillage antics leading to serendipitous findings automatically promote the S.Idiot to the position of Loom Raider, Ruiner of Rugs.