Okay, so according to the updated rules on multiples when you play the multiple keyword ability you discard a momentum for each copy of multiple you are playing and then use that discarded momentum as a marker for the multiple copy of that attack in your card pool.
The second ability of Meat Eater states that you may commit it when paying a momentum cost to count as having already paid one of that cost.
Soooo...if you "can" and do use Meat Eater's second ability on an attack with multiple, where does the copy of the attack come from? Do you have a "phantom" copy of the attack in your card pool?