Me voy a preparar y salir, si no me va a pillar el toro

[ROBINDESBOIS]

Pillar el toro ?
In English?

[hermit]

literally, "...if the bull doesn't get me.".

so "...if nothing goes wrong." ("...wonderin' where the lions are..." ha.)

hermit

[ROBINDESBOIS]

Pillar el toro means Well this is difficult to explain, me va a pillar el toro si no hago los deberes, meaning sth is going wrong, I´ll get grounded or sth like that.

[pjt33]

To get into trouble?

[Tomisimo]

To get into trouble?
I think that works perfectly. You might also try "to catch some flak", "to get raked over the coals", "to catch some heat", etc.