a. a usually circular and often variable opening in an optical instrument or device that controls the quantity of radiation entering or leaving it
"So what's up man?Cooling man""Chilling chilling?""Yo you know I had to call, you know why right?""Why?""Because, yo, I never ever call and ask, you to play something right?""Yeah""You know what I wanna hear right?""What you wanna hear?I wanna hear that Wu-Tang joint""Wu-Tang again?""Ah yeah, again and again!"