Most definitely do buy my sponsor, J-Nourishment at Jam- (jibberish) (spits and coughs) (gasp of air) 5% off.

绝对可以购买我的赞助商 Jam 的 J-Nourishment-（胡言乱语）（吐口水和咳嗽）（倒吸一口凉气）5% 的折扣。

I can guess because of the context and I can guess because some of the references, but for somebody learning English, this will sound like complete jibberish.

我可以猜测是因为上下文， 我可以猜测是因为一些参考资料，但对于学习英语的人来说， 这听起来完全是胡言乱语。