Edit: Whoops wrong sub.
A sub-marine
Anchor.
They both stop working when you take their chains off. Edit: Oh, I'm sorry. I thought this was America. By the way, got this from AskReddit.
Mine is: What is the white stuff in bird poop? (That is also bird poop.) edit: til you can't edit the topic to fix spelling errors...
my daughter, not understanding football/making football more awesome
10/11 with rice, thanks for your suggestion
A Navy Bean
With a crowbar.
You probably Reddit already.