A Little Cool （いけてる）

He Says:
iketeru!　（いけてる）=cool!
It's not a dirty word, but slang. We use "cool" many times, in jp, cool is "iketeru",or "kakkoii". So, since it's a slang, only young people use iketeru.
Japanese girl like to use iketeru. If people say iketeru to you, you are cool, but if they say kakkoii to you,you are really really cool regarding your character,sense of humor,and everything about you.

She Says:
Iketeru literally translates to "going to be able to go". I think it's hard to differentiate between various levels of cool and find an appropriate translation. However, I think this one could be translated as "got it going on".
For the record, He mentioned the word "kakkoii" as also meaning "cool". Kakkoii, however is also used by older people. Iketeru is for young people.

The next word is ...なんでやねん。