To mear means to suddenly disappear for an unknown period of time. This term is often being used in the UK.
Chav 1: Oi, mate where did Chav 3 go?
Chav 2: Oi, no idea I haven't seen him for a while.
Chav 1: Oi, he meared us.
Chav 2: OOOOOOOOOOOOOOOOOOOIIIIIIIIIIIIIIIIIIII, this tosser!