Be blown off course phrase
(Of a plan) Be stopped from happening; take place in a way that is different from expectation.
My plan for summer vacation was blown off course when the city I intended to visit recorded a few cases of Covid.
His goal to become valedictorian has been blown off course recently due to a low mark he got on the final test.
The verb "be" must be conjugated according to its tense.
This phrase is a nautical metaphor: contrary winds turn a sailing ship away from its intended course.
Someone who is totally bad at doing something.
Mary really can't sing for toffee.