To prepare for an imminent conflict (competitive or violent) by overloading oneself with equipment. From the movie _Johnny Mnemonic_ (Ice-T: You're toolin' up for an evenin.') Example: Did you see that special forces soldier in the video? He was all tooled up.
TOOL UP
Meaning of TOOL UP in English
Slang English vocab. Английский сленговый словарь. 2012