desternillarse

Se van a desternillar.
You're going to laugh.
Si al menos fuera para edificarlos, pero no; nada edificante sale de su boca y a menudo habla de política y se da gusto en tonterías suficientes para hacerlos desternillar de risa.
If this were at least in order to edify them, but no; nothing edifying ever comes from his lips, rather he often talks politics and indulges in fooleries enough to make them roar with laughter.
Palabra del día
permitirse