debbie down

When your jokes are so bad you have to follow them with a sad trombone, "wah waaaah". Can also occur when you're masturbating and a mood-killing thought pops into your head.

His jokes were so bad he had to debbie down himself.

Flub

Flabby chub.

When the chub begins to sag and droop past your belt...your chub has retired to full-on flabby flub!