Used to show appreciation, or strong like for something. Akin to floats your boat and tickles your fancy.

A positive expression, should not be confused with the likes of ‘grinds my gears’ which shows annoyance or irritation in something.
I’m a sucker for alliteration! Really mashes my potatoes you know?

Pames: I love Wes Anderson films!

Lartha: Ah they’re not for me, but whatever mashes your potatoes!
by Gasmark6Abbaxox October 17, 2020
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