My most recent posting had a cartoon pun on abdominal (muscles), muscles that have been featured prominently in huge numbers of my postings on shirtless men, under the name abs, for abdominals. The muscles come in sets, hence the plural; and then the base noun abdominal has been clipped to ab. There are plenty more of these clippings, most of them involving muscles that come in pairs.
So from a 8/19/14 posting “Abs of the week”:
It’s been a while since I posted images of shirtless men with astounding abs (and pecs, delts, traps, and biceps, but oh, those abs!) …
And there’s more on fitness sites, for example, from msn health and fitness, on Wall Ball exercises:
MUSCLES INVOLVED: Quads, Glutes, Abs, Traps, Pecs, Delts, Triceps, Total Body
EQUIPMENT: Medicine Ball