Breif-style underwear for boys, ie: before the age where they learn to know them as 'breifs'. This is a common word throughout parts of Canada, and although 'gitch' can refer to numerous pairs of the underwear, 'gitchies' is the often-accepted plural form of the word. Example: As was always the case, Christmas brought with it a new stock of socks and gitch for young Timmy.
GITCH
Meaning of GITCH in English
Slang English vocab. Английский сленговый словарь. 2012