赌气 is a separable verb (离合词) meaning to do something deliberately irrational or contrary because you feel wronged, slighted, or angry — acting out of spite or in a fit of pique. The verb 赌 and the noun 气 can split when you insert a subject, duration, or measure word: 赌什么气 ('what are you sulking about?'), 赌了一天气 ('was in a huff all day'). You usually 赌气 with someone (跟某人赌气) or over something (为某事赌气).