noun
Honorific and affectionate term for one's own uncle or a familiar older man addressed as 'uncle'. Often used by children or in family contexts. Dated when used outside family.
おじ様、お土産ありがとうございます。
Uncle, thank you for the souvenir.
隣のおじ様がいつも飴をくれる。
The old man next door always gives me candy.
noun
Only when written おじ様
Respectful but familiar way to address or refer to an older man, not necessarily a relative. Dated; now often replaced by おじさん or other terms. Restricted to the spelling おじ様.
あのおじ様はいつも公園で将棋を指している。
That old gentleman is always playing shogi in the park.
おじ様、お荷物をお持ちしましょうか?
Sir, shall I carry your luggage?
Combination of おじ (uncle; middle-aged man) and the honorific suffix 様 (さま). The kanji 叔父 and 伯父 distinguish younger and older uncles, but the kana form is more common.