ack is another way of saying "meh", but it sounds german. You can say it if youre annoyed with someone. Or, if you don't believe somebody.
by Hannah December 3, 2004
A word in which one can describe extreme to mild frustration or anger to someone or something. (Mostly used in AIM or other instant messenger conversations).
by Mr. X December 28, 2005
ack is used to describe a boy named Noah. ack basically means “UGH” showing disgust. this term can be used with the name Noah.
“ACK! NO~ACK~ (noack) WHY WOULD YOU DO THAT??
by ackkkk_ May 23, 2020
"your such an ack!!"
by brittany January 7, 2005
by R. Kemp December 3, 2005
by Bear21 July 14, 2009