A customary act performed at the urinal where one gentleman "peeks" over the partition to have a look at the other man's genitals. In no way is this a gay, just a nice gentleman's gesture to acknowledge a fellow man's package.
Matt: "Dude did you just look at my dick, your so gay."
Randy: "Relax man it was just a gentleman's peek."
Matt:"Oh...ok, no worries."