you can't be half pregnant

all over hell's half acre

All over the place; everywhere.

baker's half dozen

Seven, a group of seven.

beggars can't be choosers

Something is better than nothing: those who can't provide for themselves should accept whatever help is available.

can't carry a tune in a bucket

Sings very badly.

can't get enough

Greatly enjoys; likes a lot.

can't help

To be unable to avoid a situation, or stop something from happening.

can't stand

cannot put up with

can't stand the sight of

To hate vehemently; to really despise.