Nanka なんか 何か = Somehow, kind of
This is an useful phrase when you don't want to be too direct.
"Nanka Tanoshii ne!" "何か楽しいね！"= " It's kind of fun, huh!"
"Nanka futotta?""何か太った？" = "Did you kind of put on some weight?"
"Nanka hen janai?""何か変じゃない？" = "Isn't it kind of strange?" or "Isn't it strange somehow?"
Btw, the reason why I wrote about this phrase is because I found myself repeating this phrase when I spoke.
I tend to use it a lot when I'm nervous or when I'm trying hard to explain something.
I do not recommend you to keep repeating "Nanka..Nanka.." like I do, because it does not sound smart!
It sounds more like Yama-chan or Tanaka than Ma-chan or Hama-chan xD
Oh, but I love Yama-chan tho ;)