他在派对上公开嘲笑我的朋友，真是太不尊重人了。

He totally ___dissed my friend by making fun of him at the party.

她总是喜欢在背后说别人坏话。

She always likes to ___diss people behind their backs.

别这么快就否定我的计划，先听听看。

Don't ___dismiss my plan so quickly, hear me out first.