clutter up

US /ˈklʌt.ər ʌp/
UK /ˈklʌt.ər ʌp/
"clutter up" picture
1.

堆满, 弄乱

to fill a space or area with too many things, making it untidy

:
Please don't clutter up the table with your books.
请不要用你的书桌子弄乱
The old furniture was cluttering up the attic.
旧家具堆满了阁楼。