parent's younger brother; uncle
Refers specifically to one's parent's younger brother. Not a general word for uncle; the common word for uncle is おじ (伯父/叔父). This term is rare and may be considered old-fashioned or dialectal.
"Otooji" is an old way of referring to one's parent's younger brother.
A native compound of 弟, “younger,” and 小父, “uncle,” specifying a parent’s younger brother.