I'm reading the lyrics to Le Grand Jour, a song from the musical Les Misérables. I found this line from Javert.
Leur émeute en culottes courtes,
Je la suivrai dans leurs rangs;
Je les tousserai sans qu'ils s'en doutent...
Demain c'est le jugement dernier.
He's talking about crushing the revolution which he considers to be made of weak little schoolboys. What is the meaning of "Je les tousserai..."? I only can find evidence that it means 'to cough'.