1. a weapon of choice
2. whatever you want it to mean
3. get skeng means become hyped, normally used by 18 year-old London roadmen.
youtu.be/Dg0tn6zkXqI?t=169
"*tut* oiiiiiiiiiiii fam, me an the bois are goin down to atik, finna get skeng stiiilllll"