Look at these sentences:
To say you do something on purpose in French, you use the expression "faire exprès (de)"
Note that it never means "to do something quick/express"
"Faire exprès de" + infinitive = To (do something) on purpose
Remember that as a (+avoir) verb in Le Passé Composé, the past participle of faire doesn't agree with the subject of the verb:
Learn more about these related French grammar topics
Examples and resources
Avec tous les indices subtils qui croisent ton chemin depuis 3 semaines, il faut vraiment le faire exprès!
With all the subtle hints crossing your path over the last 3 weeks, you'd really have to do it on purpose!