catching a cold; having a cold
Colloquial noun for being in the state of having caught a cold; often used in casual conversation. Derived from 風邪を引く (to catch a cold).
See also: 風邪をひく
風邪っぴきで、今日は学校を休んだ。
I caught a cold and stayed home from school today.
風邪っぴきの時に無理すると、治りが遅くなるよ。
If you push yourself when you have a cold, it'll take longer to get better.
Derived from 風邪 (cold) + っぴき, a colloquial suffix from 引く (to catch), literally 'cold-catching'.