i Register
In some senses, loosener is marked as colloquial. Watch for register when choosing this word.
noun
Something that loosens
A usually inaccurate delivery bowled early in a bowler's first over.
An alcoholic drink that makes a person relax.
In the autumn of '72, they took a visiting Alice Cooper to see T. Rex recording at a London studio renowned for its pub bar, and after a few looseners, were invited by Marc Bolan to take part in a rambling jam session.