Chabs and Charms are basically the arms and abs of kpop boy group member Bang Chan, from the amazing group Stray Kids (stan Stray Kids)

STAYs (Stray Kids' fans) would often talk about his glorious abs and big strong arms so they mixed the words "Chan Abs" to "Chabs" and "Chan Arms" to "Charms".

Very clever of them might I add.