I'll Think about it
A fake way of saying no that people use when they're too scared to just say it. It's like when you ask someone to hang out and they say 'I'll think about it' and then go to sleep and never reply.
'I'll think about it.' (They went to sleep.)
'I'll think about it.' (They never replied.)
'I'll think about it.' (They went to bed at 8 PM.)