Doonesbury by Garry Trudeau for February 09, 1993
Cornell: Hey, Zonk! Zonker: Cornell! What's up, dude? Cornell: Boopsie said I might find you down here... Zonker: Yeah, I'm out in the open now! On-book! By the numbers! Cool, huh? Cornell: Very. Listen, Zonk, I gotta ask you something. Zonker: Shoot, man! Cornell: It involves marijuana... Zonker: Thanks. But I'm on duty. I could lose my Social Security.