Bef is essentially the shortened
way of saying the already shortened/abbreviated “cbf” which stands for “can’t be fucked” which just means you’re too tired/
lazy to do anything. This term is also used when referring to a task or a social gathering you may have the energy to do but simply just
don’t want to do/go. It can also be used when addressing someone directly as a
way of expressing your annoyance of their presence.