have too much on (one's) plate
To have too many things to do. I just have too much on my plate now that I've got this huge work project on top of the final edits for my graduate thesis. I'll do the printing—Sally has too much on her plate right now to take it on.
have too much on one's plate
and have a lot on one's plateFig. to be too busy. I'm sorry, I just have too much on my plate right now. If you have too much on your plate, can I help?