Plain English Meaning
A way of doing weight and balance where you look up the numbers in a table instead of multiplying them yourself. You find the weight of each item in the table, read the matching moment next to it, add everything up, and check that the result is within limits.
Full Definition
A weight and balance computation technique in which the pilot uses pre-printed tables, supplied by the aircraft manufacturer in the Pilot's Operating Handbook (POH) or Aircraft Flight Manual (AFM), to look up the moment value for each loaded item rather than calculating it. The pilot finds each item's weight in the table, reads off the corresponding moment, sums the weights and the moments, and then checks that the totals fall within the approved loading envelope.