A pre-agreed upon tactic used when a hot girl passes by or is nearby. The stealth wingman pretends to be blind after his friend mentions the girl's hotness, and asks said friend to describe the girl for him. This is done in hopes of arousing the girl's attention and ultimately picking her up.
Adolf: Whoa did you see that girl!?
Andrew: I'm afraid I didn't, I'm visually impaired! Can you describe her for me?
Adolf: Well, she has beautiful eyes and long brown hair. She is the prettiest sight you've ever seen.
*girl hears it and walks over*
--- Later ---
Adolf: Hey Andrew, thanks for that stealth wingman you pulled the other day!
Andrew: No problem my man! *resumes reading braille copy of The Hobbit*