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Frosting that is infected with saliva and/or snot due to the birthday boy/girl blowing out the birthday candles obsessively.
Bill: Why didn't you eat all of your cake, weren't you hungry?

Kendall: Dude, I left the top of my cake uneaten cause I didn't want to eat Corbin's snotsting - he blew so hard to get the candles out, that he snotted all over the frosting! Who put the trick candles on the cake so they would not go out?
by the coMANd'r October 04, 2016
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