A fork of Rural Dictionary
a drink/beverage (usually alcoholic) drunk quickly because of limited time.
Our flight has been delayed 30 minutes! That's annoying, but we now have time for a swift one before we board the plane.
A quick drink take in a hurry when you don't have much time but would like to be sociable - either at the end or the start of a night. Brit slang. Leads to trouble.
"Hey there Dave, how you doing?" "I went for a swift one after work with Mikey last night and woke up with my head in a crackwhore's crotch."
That girl looks so hot i think i'll just pop to the toilet and have a swift one off the wrist