I was told that "haver" meant "vomit" kinda like heave does... I imagined the singer was saying that if he was drunk and sick, she'd be the one comforting him...BUT I asked a friend who i don't see often, but is Scottish by birth, and he agreed with you... "haver" means to babble or talk non-stop or talk silly stuff... he did, however, say that many other folks had heard the "vomit" story and he was not surprised...
I hope the song is back in your good graces now...
GospelPicker
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