Totally forgot 

A phrase that is used as an excuse when you have no better reason. Rarely used when said event is actually forgotten about. Usually associated with either laziness or disgust of said event.

Taha: Hey chris, why weren't you at knitting camp?

Chris:... Oman, I totally forgot! And I really wanted to go too!

Totally forgot by Sirrofflez December 14, 2009

I'm sorry, I totally forgot to give a fuck 

You don't care. You don't give a fuck.

Teacher: Hey why didn't you do your homework?
Kid: I'm sorry, I totally forgot to give a fuck

I'm sorry, I totally forgot to give a fuck by dboyfromdahood August 13, 2012