it should be 扯淡 actually,which means bullshit in chinese.不同地方还有不同的叫法，比如：白呼，忽悠，夸白等，大致意思都是胡说八道，没有依据的说话的意思。

我听他扯蛋了半天，真无趣。 I've heard a bunch of crap from him，no fun.

it should be 扯淡,and it is a dialecticism。 1.In Chinese dictionary,one of meaning 扯 is talking aimlessly.For instance 胡扯(huche)，闲扯(xianche)，东拉西扯(donglaxiche)。 2.one of meaning 淡 in dialecticism is something which doesn't make sense. So the meaning of 扯淡 is to chatter thoughtlessly or indiscreetly,it is a verb.

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The word "扯蛋”is a impolite word that means something as the "nonsense",do u think so ?