Top Definition
The act of making love from behind, facing your partner's back; differentiated from doggy style because, when cavefishing, your partner is lying facedown and you support yourself on your elbows as in missionary position. Origin: iPhone's annoying tendency to autocorrect "facedown" to "cavefish".
"We were cavefishing when he decided to give me a west texas walrus."
by cavefishingwalrus October 31, 2011

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