Group 1: Change the last sound of the ます-form into the え sound. E.g. やすみ「ます」-> やすめ Group 2: Append ろ to the ます-form. E.g. ねろ / 寝ろ Group 3: します->しろ きます->こい
Quite 'rough' speech, normally only used by men or those in senior positions.
yutenji
This construct expresses a rough negative command ("Don't you dare do X!"). It takes the [dictionary form] of the verb and appends 〜な to it.
FekketCantenel
Formed from dictionary form verb + na
Vru = 'Dictionary' form verb (e.g. 歩く、する、いる)
Amatuka
ふざけるな! (they often say it in anime etc. means something like... how to say it... 'stop that!', 'don't make me a fool')
hassan
ふせげるな?
anon
We don't say ふせげるな! but we say ふせぐな! 防ぐ+な ふざける is 'Dictionary' form verb and not potential form. ふざけるな can be also said as ふざけるんじゃない
Miki
ふざけるな or ふざけないで meaning : " don't/ stop messing around and behave yourself" ふざける = basic meaning is " to play around", "to mess about" but can also mean " to talk nonsense".