I'll Think about it
A phrase your parents use to make you think they care, but they really just want to ignore your request. It's like when you ask for a video game and they say 'I'll think about it' and then buy a new TV.
'I'll think about it.' (They bought a new TV.)
'I'll think about it.' (They watched the game show.)
'I'll think about it.' (They didn't even look at the video game.)