What does this mean in japanese?

Travel Info
i was wondering what these words mean in japanese (i think they're bad)..

zankennayo

kuchi ni chakku

ototoi koi

ocha shinai

umm is this bad language? thanks

Travel Tips

Zakennayo(is the right way) means, "Don't kid around!"

Kuchi ni chakku means, My mouth is zipped up, in direct. Or "I won't say a word."

Ototoi Koi means, "Come day before yesterday!"

Ocha Shinai? mean, "Do you want to have a cup of tea with me?"

I don't think they are bad. Japanese people use these casually in the ordinary conversation all the time, mostly between close friends.
Others

Oh my. Zakennayo means "**** off!" Kuchi ni chakku means "Shut up!" Ototoi koi means "You better scram!" and ocha shinai means "Shall we stop for tea?"
Hope I helped.
yes, they are all bad language except for the last one, which means "Do you want to have tea?"
lived in japan for 10 years.
ototoi koi---->Get away and Never Come!

ocha shinai--->Can you date with me?

umm is this bad language? yes , they are bad words.
I don't know what zankennayo is, perhaps you meant to write zannendayo... which would mean that's too bad, unfortunate, shucks.
kuchi ni chakku - chakku is zipper, so it literally means zipper you mouth, or shut it, or zip it or shut up.

ototoi koi - ototoi means the day before, koi is come. used when you're late, or when you were supposed to be somewhere else yesterday!

ocha shinai - means i don't do tea. does not serve tea.

No, not bad language at all.

Hope this helps!