i'd do it on a wednesday
A way of saying a girl is so good looking you'd jump into a lake on a Wednesday just to get with her, not wait for a weekend and be hungover.
I'd do it on a Wednesday even if she was wearing pajamas and had a beard.
I'd do it on a Wednesday if she said my dad was in trouble with the cops.
I'd do it on a Wednesday if she told me I had to eat a whole cake for breakfast.