spec up

spec up (third-person singular simple present specs up, present participle speccing up, simple past and past participle specced up)

1. (transitive, UK, informal) To improve or optimize the attributes of (something).
   • 2018 June 21, “BattleTech review – initially ponderous, then glorious”, in The Guardian‎:

     The mech side of this is a tinkerer's paradise, allowing you to spec up your squad's weapons and armour to your heart's content, at least once you have built up the confidence to move away from stock setups.

• “spec up”, in Collins English Dictionary.