uncle's birthday

An excuse for not coming out because you're at home having anal sex

Brock was at his uncle's birthday again this week

by AmK11 March 15, 2017

uncle's cat's birthday party

an excuse that someone uses which is most likely a lie

John: Jack didn't show up for work today. Apparently he had to go to a family gathering or something.
Jake: sounds like his uncle's cat's birthday party to me.

by ja5nipe5 November 2, 2014