Green’s Dictionary of Slang

(US) term of (affectionate) address.

2008		Urban Dict. 26 Apr. 🌐 cheech Cheech is a term of affection. It is used between close friends. Being called cheech shows you are loved and valued.
2017		T. Pluck Bad Boy Boogie [ebook] ‘Relax, cheech [...] You can take your hand off the pigsticker’.