A real-life variant of the duckrolling and
rickrolling pranks.
To hand someone a glass of
the light or diet version of some drink, after either he/she has explicitly asked for the regular version or you told him/her
that it is the regular version.
Literolling is the act of giving the light version of the drink while the victim thinks he/she is getting the regular version. To be literolled is to be that victim.