A high five that is aborted before the "birth" of the high five. The abortion five unlike many similar high fives, it is clearly announced that they do not intend to complete the high five, and there is to be no meeting of the hands.

Abortion fives that are "born," when the hands make contact and thus create a high five accidentally, are called "Third Trimester Fives" as it was too late to abort them.
The Abortion Five:

E: Abortion five?

(E and B almost high five.)

B: Aborted.

The Third Trimester:

I: Abortion five!

(I can E complete the high five.)

E: Oops, third trimester.
by Ogen April 25, 2009
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Giving a girl a high five after she tells you she had an abortion.
Not even joking just because it is on Urban Dictionary, this is real, after my older sister told me about how she had an abortion because she did what she had to do, I have her a high five, or an "Abortion Five"
by The Hashslinging Slasher November 28, 2010
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