I was up all night with a sick friend spoken language informal
A common excuse for not being where one was meant to be the night before.
Mom: Where was you last night ? Son: I was up all night with a sick friend.
I didn't go home last night. I'm afraid my mom would be furious at me, but she's calmed down after hearing my reason, "I was up all night with a sick friend".
Although I said "I was up all night with a sick friend", my dad didn't trust in me.
White lie
Used to imply that someone is acting as if he or she is demure, innocent, sincere or reserved but they may be not
To be dishonest or deceptive and no one can believe
If you offer an excuse regardless of how silly or ridiculous it is, it is more likely that others might accept it than no excuse at all.