1. When a female looks at a male's genital area in their process of sizing him up. (As if a man's flaccid penis is any indication of size!); 2. The habitual grabbing of one's balls through their pants as if to check if they still have them, or to show off size to females. (an ironically unattractive action); 3. When a real man adjusts himself because...he has to. (What?)
First guy: "Bulge check! Dude, can she make it any more obvious?"
Second guy: "Yeah. Is she a slut? She acts like we men don't see them checking us out."