A flab pack is where someone gives the impression of having a muscular six pack beneath their clothing, but once the torso is revealed, it is plain to see it is nothing but a bit of flab.
This usually occurs more often with males. They may have toned, bulging arms and appear to work out regularly, but beneath that tight
white t-shirt they often favour is nothing but a rather round little
pot belly and non-existent
pecs.
Flab packs cause regular disappointment to 'totty spotters' on the beach.
Also known as 'fake packs'.