noun
my house; my place
Colloquial abbreviation of うちのうち, used mainly by younger female speakers in casual conversation to refer to one's own home.
See also: んち
今日はうちんちでゲームしない？
Wanna play games at my place today?
うちんち、駅からちょっと遠いんだよね。
My house is a bit far from the station, you know.
Contraction of うちのうち (uchi no uchi), literally 'the house of my house/family', with the second うち shortened to んち, a common colloquial reduction.