Top Definition
Noun. 1) The large penis of a racing horse. 2) A penis comparable in size to the penis of a racing horse.

Coined at
Before Mary decided to saddle up to the stud, she made sure to pack some extra-large condoms that would fit his equestriaschlong.
by Camilla Toe July 18, 2008
5 Words related to equestriaschlong

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