If you are
walking home, after a heavy night drinking having been in the same pub from mid afternoon until chuck out time at 11.20pm and you are completely unable to walk in a straight line and constantly veering into the centre of the road from the pavement, yet
in the morning you have no hangover and remember getting home, then you are said to be waggered. Generally
one of the most pleasant stages of drunken behaviour.
The word waggered comes from a mixture of stagger and wasted.