| 2026-08-09 | Angry cat's "greeting" |
| 2026-07-21 | Cat's warning |
| 2026-02-19 | Sound of disapproval |
| 2025-07-05 | Somewhat audible disparagement |
| 2025-05-23 | Express disapproval, in a way |
| 2025-03-19 | What teakettles do |
| 2025-01-25 | Indicator of deflation |
| 2025-01-02 | Pressure cooker sound |
| 2024-11-24 | Sound from a cappuccino maker |
| 2024-10-24 | Radiator sound |
| 2024-09-25 | Whisper menacingly |
| 2024-05-05 | Steam engine sound |
| 2023-04-27 | Cassette background noise |
| 2023-02-22 | Snake's sound |
| 2022-10-14 | Noise that sounds like its last two letters |
| 2020-11-29 | Blow off steam, say |
| 2020-10-06 | Radiator sound |
| 2020-03-06 | Cat sound |
| 2019-09-06 | Bad response from an audience |
| 2019-04-05 | Poor reception? |
| 2019-02-20 | Sound of contemptuous disapproval |
| 2019-02-05 | Snake warning |
| 2018-09-30 | Cat-meets-dog sound |
| 2017-12-31 | Cottonmouth's warning |
| 2017-11-19 | Feline's warning |
| 2017-05-06 | Sibilate |
| 2015-12-01 | Radiator sound |
| 2015-06-14 | Blow off steam? |
| 2015-06-01 | Snake sound |
| 2013-12-16 | Snake's warning |
| 2013-03-07 | Kettle sound |
| 2013-02-17 | Angry cat's sound |
| 2012-09-23 | Audible reproof |
| 2012-04-29 | What letting off steam might result in |
| 2012-03-11 | Unwelcome reception |
| 2011-12-13 | Snake sound |
| 2011-06-16 | *Let off some steam? |
| 2010-01-11 | Snake's sound |
| 2009-10-12 | Sound of crowd disapproval |
| 2009-01-24 | Moccasin sound |
| 2007-09-16 | Cat's warning |
| 2007-07-24 | Villain's reception |
| 2007-07-23 | Serpentine sound |
| 2007-07-05 | Cobra's greeting |
| 2006-12-01 | Express disapproval |
| 2005-08-21 | Cat sound |
| 2005-05-30 | Angry audience reaction |
| 2005-01-22 | Sign of hostility |
| 2004-09-29 | Villain's reception |
| 2004-06-01 | Greeting for a villain |
| 2003-06-06 | Blow off steam? |
| 2003-05-11 | Unwarm welcome |
| 2002-01-15 | Radiator sound |
| 2001-09-19 | Unwarm welcome |
| 2000-07-18 | Sound like a snake |
| 2000-05-06 | Express displeasure |
| 1999-09-29 | Unhappy fan's reaction |
| 1999-06-24 | Warning sound |
| 1999-04-16 | Fuse sound |
| 1998-08-24 | Snake's warning |
| 1998-08-05 | Greeting for the villain |
| 1998-07-17 | Vent sound |
| 1998-05-08 | Ophidian sound |
| 1997-11-21 | Heckle, in a way |
| 1996-09-29 | Greeting for Legree |
| 1996-03-21 | Sound like thisss |
| 1995-11-05 | Boo follower |
| 1995-08-24 | Defendant of 1949 |
| 1995-05-14 | Unwelcome greeting |
| 1995-03-05 | Greet uncivilly |
| 1995-02-08 | Coal-dousing sound |
| 1995-01-25 | Serpentine greeting |
| 1995-01-20 | Leak indicator |
| 1994-12-14 | Infamous Alger |
| 1994-06-30 | Subject of the book "Perjury" |
| 1994-03-12 | Sibilate |
| 1993-12-02 | Serpent song |