(onomatopoea)-- no, the 'h' is not silent! signifies the feeling of extreme pity toward another; another way of saying, I'm glad that I'm not in your shoes (unless they're Pumas-- freshest shoe EVER!) For some reason it appeared out of context in a Batman episode..... Example: YECKH! (in reference to my pity for the people who payed to see Pearl Harbor) or YECKH! (Batman hits the Riddler)
YECKH
Meaning of YECKH in English
Slang English vocab. Английский сленговый словарь. 2012