when someone is standing,kneeling,bent over with their legs spread open you move your hand in between their legs and pull up getting their privates in your hand, if you successfully catdog them you would then say something like "fucking walk" and make them walk before they let go or lift them up in the air which is very painful and one of the worst feelings ever
John talking to Magnum: smells like vagina
Derek walks up to magnum and catdogs him: FUCKING WALK BITCH!!!
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