George Lopez owes Bill Cosby a cigar, he admitted when the veteran comedian visited 'Lopez Tonight' (weeknights, 11PM ET on TBS). He took one from Cosby many years ago -- and he may have taken some of Cosby's comic mojo, too.

After performing at the Paso Robles fair in California, Cosby left a half-smoked cigar in his trailer. Apparently, Lopez cut off the end and smoked the rest.

"I've never told anybody that because I was hoping that something you inhaled through your cigar, I would inhale through your cigar," Lopez explained. "I walked around [the event] trying to be you in Spanish."

But the story doesn't end there. Cosby said he went back to retrieve it...