What is Swift One?
1.
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."
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