Eggcorn Forum

hammer and tongs – 108,000 ghits
hammer and tongues – 4,750 ghits (inflated by wordplay/song lyrics etc)

‘Tongues’ is sounded as ‘tongs’ in some varieties of BrEnglish which may account for some of them, but it seems clear that some people have encountered this expression being used to describe an impassioned verbal argument, as well as other kinds of encounter…

I was much amused by one in particular, given the con­text: “delegates going at their speech(es) hammer and tongues(sic)”. 3) In scrupu­lous devotion to …
interpreters.free.fr/reading/bookreviewjones.htm – 10k – Cached

The public gets to watch the Australian parliament in session – which when the “pollies” a.k.a. politicians, set on each other with hammer and tongues, ...
www.upfromaustralia.com/inhousofrepp.html – 12k – Cached

I remember one night when we were having tea, my mum and I were at it hammer and tongues, and he just picked up his plate and smashed it on the floor and he …
www.watchtowerinformationservice.org/.../ – 84k – Cached

Regarding interpretation and most discussions about the Nibelungs traditions, however, the experts go at it hammer and tongues to maintain or defend their …
www.badenhausen.net/harz/svava/svava_en.htm – 83k – Cached