Mr Benn

Named for the British TV show of the same name, it is the act of waking up hungover in a strange place with no recollection of how you got there (and optionally in different clothing than you left in)

This originates from the plot outline of each episode of Mr Benn being that the titular character would enter a magical clothes shop, get changed in a changing room, then exit to a new different place

Oh Trev! I ended up doing a Mr Benn last night and woke up in London! We started drinking in Aberdeen!