Final answer:
The brevity code word meaning an interrogated Group/radar contact lacking all required ID codes is "BOGEY".
Step-by-step explanation:
The brevity code word that represents an interrogated Group/radar contact lacking ALL of the ATO or IFF codes required for ID criteria is "BOGEY". In military and aviation contexts, a bogey refers to any unidentified aircraft or radar contact. When an aircraft or radar contact lacks all the necessary codes for identification, it is classified as a bogey.