During sex, one of the partners will start to mimic the flopping
motion of Magicarp's splash attack erratically, arms tucked into your sides, and legs close together, whilst repeating the word Magicarp as you flail, as a
pokemon would. Best used whilst in a prone sexual position, whilst on
top of your partner.
Nigella:'Tom pulled a Magicarp on me last night!'
Mary:'Whats that?'
Nigella:'He started to
flop up and down on
top of me, whilst shouting magicarp!'