scram 1
/skram/ , v.i. , scrammed, scramming . Informal.
to go away; get out (usually used as a command): I said I was busy, so scram.
[ 1925-30; prob. shortened form of SCRAMBLE (but cf. G schramm, impv. sing. of schrammen to depart) ]
scram 2
/skram/ , Informal.
n.
1. the rapid shutdown of a nuclear reactor in an emergency.
v.t.
2. to shut down (a nuclear reactor) rapidly in an emergency.
[ 1945-50; perh. identical with SCRAM 1 , though sense development is unclear ]