"feel crappy" is correct and usable in written English.
You can use it to describe feeling ill or having a bad mood. For example: I woke up feeling really crappy this morning.
I'd try to exercise and feel crappy.
Treehouse Envy How two hot daddies can make you feel crappy about your treehouse.
You'll inevitably feel crappy and probably desperate if you don't have success.
That's what makes me feel crappy when I scroll through Tumblrs like these.
AUTHOR: LISA GABRIELE Sept 11th , 1983Right now I have a bad headache and I feel crappy.
We may feel temporary relief for scapegoating everyone else for feeling crappy, but research shows that this strategy soon makes us feel crappier.
Yes, lack of response from someone you're digging feels crappy.
If you felt crappy, it's because you consented to do so.
I felt crappy, but had no other recourse....But another amazing thing happened that day.
I felt crappy after a recent cancellation, when a friend texted me ten minutes before we were to meet (after I had re-arranged my schedule) and said that she was cancelling because she had not slept well the night before but wanted a rain check... followed by a big XO and a frowning emoticon.
