Don't wait up for me

avoidance

 noun, often attributive

avoid·ance | \ ə-ˈvȯid-ᵊn(t)s  \

Medical Definition of Avoidance 

: the act or practice of keeping away from or withdrawing from something undesirablereinforced by escape or avoidance of electric shock—E. S. Katkin & E. N. Murrayavoidance learningespecially : an anticipatory response undertaken to avoid a noxious stimulusconditioned avoidance in mice

courtesy of: Merriam-Webster