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To 'Griss Lock' means to have forcible or unconsented sex with any animal in a manner similar to the '69' postioning.

To try and attempt the above.

Can also be hyphenated i.e Griss-Lock
Did you hear about Farmer Joe? He fucking griss locked his cows!

I bet Tim griss locks his cat!

by Willba-Beast May 06, 2008
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