fish tanking

When two people are making out intensely enough and for such a duration that they make a considerable amount of noise.

This often irritates the unlucky individuals around them, who must either tolerate the noise or awkwardly tell them to "shut the fuck up".
Girl: "Hey, I totally know about how you you two were hooking up in the closet last weekend."

Guy: "How'd you find out?"

Girl: "Because you two were totally fish tanking!"
by MasterFishTanker February 01, 2011
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