Fancy a quick drink right now? (4,1,4)
I believe the answer is:
like a shot
'right now?' is the definition.
(both can mean straight away)
'fancy a quick drink' is the wordplay.
'fancy' becomes 'like' (both can mean to find someone attractive).
'quick drink' becomes 'shot' (small drink drunk in one go).
'like'+'a'+'shot'='LIKE A SHOT'
(Other definitions for like a shot that I've seen before include "Enjoy a wee dram" , "Lout" , "What tequila drinkers might do" , "sluggish?" , "Outright" .)