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A term which refers to anthropomorphized humans engaging in sexual frottage, but only when one or both parties are marine animals.

(Marine form of Yiffing)
"Hey man did you see that cute dolphin chick at the con last night?" "Yeah?" "We totally glissed it was so hot." "Dude! I wish I could lock down that porpoise - I've always wanted to try glissing"
by vitriola December 29, 2015
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