抽风 has two main meanings. In a literal sense, it means 'to ventilate' or 'to induce a draft' — for example, opening windows to let air flow. In medical and colloquial use, it means 'to have a convulsion or spasm', and is also used figuratively to mean 'to act crazy or freak out'. In the medical sense, 抽风 is a separable verb (离合词): you can insert a measure word or duration between the syllables, like 抽了一次风 ('had a convulsion once'). Be careful with the two senses — context (machine, room vs person) tells you which is intended.