A gentle challenge or rejoinder to a fanciful or bullshit statement or a tall tale. An idiom you use to tell
someone that you do not believe what they have just said.
Derived from the game where you ask someone to "pull my
finger" and fart, then ask them to "pull my other
finger" or "now pull the other one".
-- Example 1 --
GUY 1:
"Yeah I drank about
20 beers but the cop couldn't tell I was drunk and let me go."
GUY 2:
"Pull the other one. I don't think so."
-- Example 2 --
From
Scene 1 of Monty Python and the Holy Grail:
KING
ARTHUR:
Whoa there!
clop clop clop
SOLDIER #1:
Halt! Who goes there?
ARTHUR:
It is I,
Arthur, son of Uther Pendragon, from the castle of Camelot. King of the Britons, defeater of the Saxons, Sovereign of all England!
SOLDIER #1:
Pull the other one!
ARTHUR:
I am,... and this is my trusty servant Patsy. We have ridden the length and breadth of the land in search of knights who will join me in my court at Camelot.
I must speak with your lord and master.
SOLDIER #1:
What? Ridden on a horse?
ARTHUR:
Yes!
SOLDIER #1:
You're using coconuts!
ARTHUR:
What?