This is the 9099th most frequent Catalan word.
fotessin
"Fotessin" is the third-person plural imperfect subjunctive form of "fotre," meaning "to put," "to do," or colloquially "to mess with" depending on context.
Here, 'fotessin' is used as a subjunctive form to express a hypothetical situation if conditions aren't met.
Si no lluitem, és molt possible que ens fotessin fora de la competició.
If we don't fight, it is very likely that they would kick us out of the competition.
In this sentence, 'fotessin' is in past subjunctive, indicating a desire or request expressed in the past aimed at others.
Ells volien que es fotessin d'un cop a fer la feina.
They wanted them to get started on doing the work at once.
Here 'fotessin' conveys an action hypothetically performed upon us in the past subjunctive form.