Possible Clues:

• Say nothin', say?
• Suppress
• Leave out a vowel, e.g.
• Say ''somethin'''
• Omit, like the "t" in "Swee'Pea"
• Say 'e'er,' for example
• Say somethin'?
• Slide over, phonetically
• Say "g'bye"
• Have 'nothin'' to say, e.g.