chasing rainbows
trying to achieve something that's unrealistic
dry spell
a long period without success
Bolt out of the blue
sudden and unexpected
made in the shade
in an ideal situation
steal someone's thunder
take attention away from someone
every cloud has a silver lining
there is good in a bad situation
dancing up a storm
using a lot of energy to dance
blow everyone away
easily defeat the competition
rain on someone's parade
spoil a person's pleasure or plans
once in a blue moon
very rarely
chill out
relax
don't have the foggiest
confused and having no idea