Definition of jackhammered:
(n) :
A portable percussive power tool that combines a hammer and chisel used to drill or break hard matter, for instance rock or concrete.
(v) :
(intransitive) To use a jackhammer.
(v) :
(transitive) To break (something) using a jackhammer.
(v) :
(transitive) To form (something) using a jackhammer.
(n) :
(figurative) Something that is very strong but also very rigid.
(v) :
(intransitive, figurative) To move like a jackhammer.