Is there such a thing as a non-practicing agnostic?

I would like to know… so I can tell other people what my religious beliefs are… people sometimes tell me that they are non-practicing catholics… can Agnostics say the same?

example I went to Christmas dinner at a hotel with my mom… but I don’t celebrate Christmas… but my mom does… she said she is a non-practicing Catholic and doesn’t go to church, but loves Christmas decorations.