Top Definition
When a man is under the belief that he is having protected sex with a female, only to find he is wrong.
Did you here about Steve?

Yeah, his "Unexpected Load" is due in about 9 months.

OR

He thought I was on the pill.

Jesus Kathy, that's a hell of an "Unexpected Load" to explain to poor Steve.
by holymarymotherofdeath November 19, 2011

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