Grammar fix
blow a chance
ruin a chance
To lose a good opportunity because of a mistake or poor performance.
How oftenCommon
LevelB2
Used inSpeech & writing
Hear it in context
Notice where the phrase sounds natural.
I blew my chance of getting the promotion by losing my temper in the interview.
I once blew a chance to study abroad because I left the application until the last minute.
Fix the pattern
One small grammar move makes it sound right.
Not: He blew up his chance of getting the job.
Say: He blew his chance of getting the job.
Do not add 'up' when 'blow' means ruin an opportunity.
Don't confuse it
Other ways to say it
Miss your big moment by your own fault
How formalCasualMore formal
blow a chanceYou're here · Informal: lose a chance through a mistake or poor performance.
throw awayWaste an available opportunity through your actions or inaction.squander an opportunityMore formal: waste a valuable opportunity.