1. shitless - Adjective
2. shitless - Adjective Satellite
(used as complement) to the utmost degree
Source: WordNetThe beginning of genius is being scared shitless. Louis-Ferdinand Céline
He introduced me to all the intellectuals at S. F. State and convinced me I should be a writer since I had so many fucking stories to tell. Little did he know I was scared shitless of all those guys with the tweed coats and fancy pipes. Oscar Zeta Acosta
We choose our lovers for their flaws, you know," Mel said. "People would be bored shitless if they had to love only the good in someone they care about. Larry McMurtry
I actually hate comic book movies, like fucking hate them, they just bore me shitless and they're just dumb. But I thought what Chris Nolan did with Batman was actually really good, really well directed, and Christian Bale was really great in it. Heath Ledger
he was scared witless Source: Internet
the students were bored shitless Source: Internet