Leave (one) flat informal verb phrase figurative
To leave someone bored, unsatisfied, or displeased.
Listening to the scripted talks on the radio really leaves me flat.
He chortled with delight at a joke, but it left me flat.
To abandon someone, especially abruptly or unexpectedly.
Why would she leave her only child flat? The story just doesn't stack up.
Mary left me flat at the party after seeing her ex.
To abandon someone who is alone or in a dire position with no money or resources.
I spent all my savings on shopping, which left me flat.
To make one distracted, frustrated, or irritated
Said when you are too tired to do something
To abandon someone you was going to marry at the wedding ceremony just before it is supposed to happen
1. If something/something is cast adrift, they move on the surface of a liquid in an uncontrolled way, or they are freed, lost, or fired.
2. To cause someone/something to move in an uncontrolled way on the surface of a liquid or cause them to be freed, lost, or fired.
3. If you cast someone adrift, you abandon them.
The verb "leave" should be conjugated according to its tense.