السلام عليكم و رحمة الله و بركاآته ~

Hi people . .
I have 1 or 2 things that I need to find out thier meanings
I think that the 2 words have kinda bad meanings but anyway, I need to know
^^"

What was that, Gachapen?!
. . ................Don't call me Gachapen, Pony Man!

the underlined words, please
I'll be very thankfull if you helped me with that

I'll be waiting =)
Good Bye ~