It's usually defined as the personally preferred instance out of a choice of equivalents.
Are you a bit thick or something?
( Mr. Tea 'ulmmm'/'mmneurgh', Fri 24 Jan 2014, 12:34, archived)

odd but its your choice so fair play

( Sir Sand GOBLIN ^popular page dis, Fri 24 Jan 2014, 12:38, archived)

Actually, scratch that,
mine's banana flavour.
( Mr. Tea 'ulmmm'/'mmneurgh', Fri 24 Jan 2014, 12:44, archived)

fickle

( Sir Sand GOBLIN ^popular page dis, Fri 24 Jan 2014, 13:34, archived)

That what my mum said.

( monster munch person, man, woman... camera... TV?, Fri 24 Jan 2014, 13:35, archived)