Errand

[rebbonk]

McQuillan walked into a bar and ordered martini after martini, each time removing the olives and placing them in a jar.

When the jar was filled with olives and all the drinks consumed, the Irishman started to leave.

"S'cuse me", said a customer, who was puzzled over what McQuillan had done, "what was that all about?"

"Nothin', said the Irishman,

Spoiler:

"me wife just sent me out for a jar of olives!"